The murder of 60-year-old Mary Yoder in 2015 sparked a complex investigation in Oneida County, New York. Mary, a beloved chiropractor, died suddenly after consuming a protein shake, with toxicology revealing lethal levels of colchicine, a gout medication she had never taken. Suspicion initially fell on her husband, Bill, but an anonymous letter pointed to Adam Yoder, who had a relationship with Mary’s sister. The case pivoted when office manager Katie Conley, who had a long history with Adam, was linked to the colchicine order via her phone and office computer. Digital evidence showed she researched poisons, created falsified documents, and used a Gmail account tied to Adam’s email address—details matching the anonymous letters. Prosecutors argued Katie poisoned Mary, while the defense claimed Bill had motive through financial gain, prior relationships, and knowledge of plant-based toxins. Katie was convicted on multiple counts but later acquitted after a mistrial and a 2025 overturned conviction due to illegal evidence collection. Prosecutors tried again, but were blocked when case records were sealed, preventing access to critical digital data. The state’s inability to proceed, combined with legal rulings nullifying key evidence, effectively stalled the case. Despite the lack of a definitive perpetrator, the case remains emotionally unresolved, with Mary’s family deeply divided and no clear resolution in sight. The case underscores the dangers of circumstantial evidence, the power of digital trails, and the persistent trauma of betrayal within trusted relationships.
Hi, Crime Junkies. I'm your host, Ashley Flowers.
And I'm Britt.
Last episode, I walked you through the first five months following the death of Mary Yoder.
Sixty-year-old Mary was happy, healthy, and beloved by her friends, family, and patients
near Utica in central New York, where she and her husband Bill were chiropractors with
their own practice. But out of nowhere, one Monday afternoon in July 2015, Mary became
violently ill. Her son had been sick with the same symptoms a few months before, and
it took him a while to heal, but he had. So initially, she and her husband thought that
this was the same thing, some kind of stomach bug. But in less than 48 hours, Mary was dead.
And when toxicology results came back, they revealed something no one knew while she was
alive. Mary had lethal levels of a drug called colchicine in her system, a gout medication
that she had no idea what it was.
As it became clear that Mary was poisoned, suspicion fell on her husband Bill, who had
started a relationship with one of Mary's own sisters just two months after his wife's
death. But just as detectives were getting started, an anonymous letter arrived at their
office, pointing the finger at someone else entirely. The tipster claimed that Bill and
Mary had been together for years, and that there was proof. The colchicine bottle was
still in Adam's Jeep, the letter said. And sure enough, when police went looking, there
it was, with the receipt of purchase, emailed to MrAdamYoder1990 at gmail.com.
It all seemed a little too perfect for Oneida County Sheriff's Lieutenant Robert Nelson
and Investigator Mark Van Amy. An anonymous letter that just happened to lead them right
to the evidence?
They had to wonder, was someone trying to frame Adam? And if so, who? His own father?
Police clearly didn't have a full picture of this family yet, so they brought in one
person who knew all of these players, 22-year-old Caitlin Conley. Katie had dated Adam on and
off for years, and she was the office manager at Bill and Mary's practice. But she was more
than an employee. Mary considered her family. She was even mentioned in Mary's obituary.
And soft-spoken testimony?
Katie didn't point the finger at Bill. Instead, she told detectives how suspicious she was
of Adam. But the more she talked, the more convinced they became that Katie sounded a
lot like their anonymous letter writer. So after that first meeting with her in mid-December
2015, detectives walked away with a new question. Not, did Adam do it? But who is Caitlin Conley?
And what have we been missing? It turns out. A lot.
Are you ready to dive back in, Britt?
Let's go.
Let's go.
Let's go.
As soon as detectives found the colchicine with the receipt in Adam's car, they began
trying to trace where it came from and who it was shipped to. What they found is that
the one-gram bottle of powder was mailed from a company in California to the Yoder's chiropractic
office in February 2015, addressed to Adam. But the person who signed for it was the office
manager, Katie Conley. Which isn't unusual, right? She signed for most packages at the
practice. What is unusual is her connection to the email address that ordered it. Google
records show that the email used to buy the colchicine, that Mr. Adam Yoder 1990, it was
accessed from the Conley's home IP address, where Katie lives with her family. Then, in
late November, that entire Gmail account was deleted using her phone.
So, just a few days after they spoke with Katie, investigator Van Amey and Lieutenant
Nelson asked her to come back in. And they confront her with what they found. You say
you've never heard of Mr. Adam Yoder 1990 email address? But it was deleted from your
phone. How do you explain that? At first, Katie suggests maybe Adam accessed it using
her cell at some point.
Like logged in or deleted it?
Logged in, which, you get it, it doesn't explain the thing investigator Van Amey and
investigators are actually asking about. Right. So, eventually, she admits that she is the
one who deleted the account, but only after she just stumbled across it. The thing is,
even that doesn't really make sense, because when you delete a Gmail account, you know
what you need? The password. Yeah. So, detectives push her. You knew the password at some point,
Katie. What was it? She says she can't remember. Now, they humor her, not going super hard,
because they can tell.
That she's building towards something. And finally, she comes out with it. Adam confessed
to her and told her that he ordered the colchicine, had it shipped to the office, poisoned his
mother, then stashed the bottle in his Jeep. She says Adam regrets it, that she thinks
he killed Mary by accident, mostly because she doesn't understand why he'd want to
hurt her. But she also claims that he asked her about colchicine about a year before Mary
died, wanting to know how to get his hands on some.
Adam, how do you accidentally plan something for like a year?
It's not adding up.
It also sounds a heck of a lot like the anonymous letter that they got. Like, word for word,
he regrets it, he stashed the bottle in his Jeep.
Bingo. And remember, they don't just think that this letter came from a tipster trying
to do the right thing. Before they ever can tie anyone to it, they felt pretty confident
that the letter was written, or the letters, there was two of them, they were written by
Mary's real killer to throw off suspicion.
Mm-hmm.
They pressed her on it. You wrote it, didn't you? And once Katie admits it, investigator
Van Amy starts recording. In the footage, Katie is sitting at the side of a desk in
a small office. She's quiet as she waits for Van Amy to come back into the room.
We've been chatting for quite a while today about a lot of things. I want to ask you some
more specifics.
I really appreciate you helping us out and pointing us in the right direction with the
letter into Adam, okay? You follow me then?
Yeah.
Okay. Why are you so upset? Have I been anything less than nice to you?
No, you've been really nice. I'm just afraid because Adam's really smart.
Okay. And you've said that to me a couple times, that Adam's really smart. He's not
going to let anything come back to him. I understand that.
I understand that.
But myself and my friends in the other room, the investigators on this case, are really
good at what we do, okay? And we always get to the truth. I believe you about what you're
telling me about Adam. You know, I just need your help to help me prove it's Adam, okay?
You can't prove it's Adam.
Okay, well, that falls on me.
Yeah, but if you can't prove it's Adam. Who's it? Who am I going to prove it is then?
Right.
Right.
Who did he make this look like it is?
I'm afraid he put it back on me.
You're afraid Adam did?
Yeah.
Why?
I don't know. It's something that I can't. I can't go to for help.
Do you know that he did that? Do you know that he's trying to point the finger at you?
No, but at the office he said that if anyone was going to get in trouble, it was going
to be me.
Okay.
Why would he keep the container? Why would he keep something that's going to link him to the crime that he just committed? You know what I mean? Yeah. You could have dropped that in any garbage can and nobody would have been the wiser. Can you put that in a soda cup or a soda bottle? Put it in that garbage. You could have thrown it out in here and we would have never known. Right. You can get rid of it anywhere. Why do you think Adam held on to that? I didn't keep it for so long.
I'm going to ask you a straight up question. Every time I ask these, I already know the answer. Is it possible that somebody made it look like Adam did this?
Yes, but I don't think so.
It is possible that somebody planted that on him? Because I can tell you right now, in the FBI's studies and everything that we went back on, guys don't hang on to the murder weapon because that's why they get caught.
Right. The guys also don't use poison.
What do people do?
They say it's a lady's weapon.
Yeah.
Now, Vanamee has clearly been playing good cop. We believe you. We're going to find the truth and help you. But Katie's got her shovel and she just keeps digging herself deeper.
No kidding. Poison is a lady's weapon? Like, does she, does she hear herself?
I know. It is looking weird.
It's worse and worse for Katie. So that's when Vanamee and Lieutenant Nelson swap out.
little more direct with the questions here's some issues i still have you gotta you gotta look at it
from our point of view we're looking at one of three people here the husband adam or you you're
gonna have to help us if you're telling us you have nothing to do with this you're gonna have
to help us rule you out just like we gotta rule out adam or bill whoever is not responsible for
this because right now there's a lot of things unanswered questions that we have right um the
gmail account and some other things and like you said those don't point to adam they point to that
phone i know you need to help us clear you katie has gone from witness to suspect but investigators
aren't ready to arrest her yet they want to be able to directly tie her to the culture scene
in a way that she can't like wiggle out of so they start digging into the digital trail to
piece everything together and there is a lot to unpack here so just bear with me what they find
is that they're not going to be able to tie her to the culture scene they're not going to be able to
the mr adam yoder 1990 email account was created back in september 2014 using the ip address at the
yoder's office that same month someone opened a credit card in mary's name but the contact number
on that account katie's cell then a couple of months later in december a prepaid credit card
was used to try and buy culture scene online but that order failed because the supplier required
paperwork that the buyer didn't have in order to try and buy culture scene online the supplier
early january 2015 someone tried again with a second prepaid card from the same store this time
it went through and they bought a gram of culture scene from that company in california now to
complete the order the buyer submitted a letter of intent explaining who they were why they needed
the drug now the letter was supposedly signed by adam and mary and it listed adam as the buyer and
claimed that he needed the culture scene to manipulate plant genetics and it also named him
as the manager of the culture scene and it was also named as the manager of the culture scene
at the clinic even though again he had not worked there in years meanwhile on the front office
computer which katie used more than anyone there were searches for various poisons including culture
scene and how much it would take to kill someone based on their body weight one investigator even
told abc news that someone took mary's exact body weight and plugged it into a formula to calculate
the fatal dose although we couldn't find that detail in the records that we have and what's
interesting is
some of those searches happened about a week after adam went to the er with the same symptoms that
mary would later have wait is called seeing what made him sick too well at the time they just
thought it was a stomach bug i mean they ran blood work they did scans noted mild inflammation in his
intestines gave him medicine sent him home never tied to culture zine because why would you do that
kind of thing unless again you're doing an autopsy anyway that same office computer had been used to
access the gmail account tied to the culture scene order so the office computer she uses the most has
the gmail account on it the mr adam yoder 1990 which was also pulled up from her home ip address
and eventually the account gets deleted altogether but from her phone correct but just staying with
the office computer for one sec in november 2015 so this is around the time the anonymous letters
were sent someone installed software on it to mask ip addresses
what way to hide like what sites had been visited but it didn't work the clinic's antivirus program
logged the activity anyway and what it recorded was that someone on that computer during business
hours was downloading the masking software first then using a private browser to log into that same
gmail account so whoever did this took steps to cover their tracks before they ever pulled it up
was trying to hide it in the first place and listen there's also a typewriter at the office and the
ink ribbon still had faint impressions of what had been typed which matched the anonymous letters
sent to the me in the sheriff's office then on katie's phone investigators found a deleted note
with lines that read 1990 at lowercase g and capital a is gay they figured that this was
shorthand for the email address that's at the center of this whole thing mr adam yoder 1990
at gmail.com
and maybe it's password which turned out to be adam is gay now that same email and password
were also used to set up a document scanning app on katie's phone too the app had been deleted by
the time they got to it but the cloud storage was still accessible and in it were scanned copies
of every document sent to the supplier the order forms the letter of intent all of it
there was also a letter of recommendation that mary had written for katie with mary's signature on it
implication being that that could have been used to forge the other documents and there were other
notes on katie's phone that suggested she had been like workshopping how to frame adam drafting the
language for the letter even references to legal standards like what police need from an informants
tip before they can use it to get a warrant now contrary to the mountain of evidence they find on
katie's phone when they search adam's devices those all come up clean no poison research no
suspicious searches no sign that he ever tried to buy colchicine and the physical evidence tells a
similar story katie's dna is consistent with being a major contributor on the colchicine bottle on the
colchicine bottles wrapper and under the stamp on the letter sent to the medical examiner adam's dna
doesn't show up anywhere so on february 5th police bring katie back in and investigator van amy
confronts her with something major when katie comes back into the sheriff's office in february
van amy doesn't just hit her with all the digital forensic evidence like he's got her on that
what he wants is to tie her to the actual prepaid cards that were used to buy the drug
so he bluffs he tells katie that police have surveillance footage of her buying the prepaid
credit cards if you purchased them you're involved in this
i'm telling you katie there's no way around this okay i've let you sit here that's why i asked if
i could show you this
okay i let you tell me i don't know how that got on my phone okay we're across from now okay
because i know all along i don't ask a question i don't know the answer to
okay you purchased those credit cards didn't you yes so she admits to buying the cards
but she still insists that she didn't actually buy the colchicine and the only explanation she
can offer is that somehow adam must have used them
even though according to investigators cell records show that adam was nowhere near katie
on the day that she scanned the documents needed to make the purchase those documents
were scanned in your phone i know that and you were in possession of your phone
we're at a crossroad right now katie and i'm going to be honest with you
you lied to me earlier when you said you don't know how those were scanned
i know for a fact that you were in possession of your phone when they were scanned
yes
you're saying you purchased this credit card and it was immediately used for the payment
within a day who did you give that credit card to that if that's the road we're going to go down
let's keep rolling this no more that's not the only hole in her story you see investigators had
found a draft of the anonymous letter saved on the google drive connected to that gmail account
it had been edited in november right before it was sent so now if katie
admits to writing that letter she is also admitting that she had access to the gmail account
and if she was the one using the account she is the one who ordered the poison but what do you mean
if she admits to writing the letter i thought she already admitted to writing it she did but now
she's saying that she didn't write this letter the one that was drafted in november what yeah
she claims she sent a different letter to police like back in september
it we can prove without a doubt that it's typed in november okay okay we we know that that's not
even that's not even a question okay i'm telling you in the one one of the last times i talked to
you you told me about sending the letter in november no in september you katie i'm telling
you didn't there's no way you sent that letter in september that's what you told me you didn't
send the letter in september you're the one saying adam told you that he did this so if nobody else
is involved in this you're the one saying adam told you that he did this so if nobody else is
involved in this you're the one saying adam told you that he did this you're the one saying adam told
in that your letter nobody else sent us a letter we got one letter you said you sent us a letter
that's your letter i'm confused the way my brain almost exploded as i tried to like untangle this
i mean basically if she wrote the letter she owns the suspicious gmail account and if she
owns the account that's it i mean did police get a letter in september no the only letters
anyone received were the two in november one to the sheriff's office one to the me's
so investigators are starting to develop a pretty clear picture of what they think happened
including a firmer timeline.
Colchazine poisoning typically shows symptoms within eight hours,
but a large dose can hit a lot faster.
Their theory is that Katie laced Mary's afternoon protein shake
around 1 to 1.30-ish on July 20th while they were both at the office.
But why?
Well, prosecutors theorize that it all goes back
to Katie's tumultuous relationship with Adam.
In their view, Katie is a scorned ex
and Mary is just collateral damage,
either revenge on Adam or some kind of twisted attempt
to pull him back after he dumped her,
supposedly for cheating on him.
Either way, basically like an,
if I can't have him, I'll hurt him,
or I'll be the shoulder that he cries on after,
like if I secretly create a tragedy.
They also say that this wouldn't be the first time
that Katie did something dramatic to win Adam back,
that she once faked an ectopic pregnancy,
she said that she required a medically necessary abortion,
which led to them rekindling their romance.
And according to prosecutors, it worked again this time,
because after Mary died, Adam leaned on Katie,
and that's when they briefly got back together.
It's a compelling narrative with compelling evidence to back it up,
which is why nearly a year after Mary's death on June 13th, 2016,
Katie gets indicted by a grand jury,
on charges of second-degree murder,
falsifying business records,
second-degree forgery,
and petty larceny.
The falsifying accounts are for the documents
that she allegedly created to make it look like Adam bought the colchicine.
And the other charges came out of the investigation.
I guess the forgery is for a parking ticket
that she supposedly signed with Bill's name,
and then the larceny is for about 90 bucks
that the investigators say she stole from the office.
Now, the assistant DA knows
that most of the evidence that they have
is just circumstantial,
but she still firmly believes
that the case is really strong.
Except, not everyone is convinced.
According to ABC News,
Katie's arrest sends shockwaves
through their small community.
The Yoders and the Conleys are both well-known families,
and this case creates this real divide.
In fact, some of Mary's own
sisters side with Katie.
They are still much more suspicious of Bill.
Even after all of this comes out?
Yep.
I'm presuming not including the one dating him.
Oh, no, yeah.
So the ones who are suspicious
are still the same trio that I mentioned before,
Janine, Sharon, and Sally.
And even though authorities say
that there's no evidence implicating Bill,
that is exactly the argument
that the defense makes
when Katie's first trial begins
in Oneida County Court
in April 2017.
Katie's attorney, Christopher Pelley,
says that Bill had something
that Katie didn't have.
Real motives.
A troubled marriage.
Money problems that went away
when Mary died.
And possibly an affair
with Mary's own sister.
Starting with the marriage,
Pelley says that it wasn't as solid
as Bill claimed.
Before they even tied the knot,
I guess Bill had suggested
keeping things open,
which they decided against.
And Bill says that he
never cheated on Mary.
But at some point,
he started disappearing
to hotels on various weekends.
Those solo trips I talked about,
supposedly to write.
And so they kind of pose this question like,
was that really the only reason
he would take these trips?
And then there's the Kathleen of it all.
What kind of guy takes up
with his dead wife's sister at all,
let alone two months
after your wife dies?
And how do we know
they even waited that long?
I mean, sure,
Kathleen and Bill say
it all began in September,
but a neighbor of Kathleen's
testifies that she saw them
on Kathleen's front porch
all snuggled up,
looking very much like a couple
the week before Mary died.
And don't forget about the money.
True, Mary didn't have
any life insurance,
but Bill had recently inherited
that close to half a million bucks
from his dad.
And after Mary died,
he told one of his daughters,
Tamron, that while it wasn't enough
for two people to retire on,
it was for two.
It was for just one.
And what's up with Bill's behavior
after Mary died?
Why did he ever cremated
before anyone knew
what the heck was going on?
Why wasn't he more curious
about what killed her?
Why didn't he push investigators
for answers?
Because it sounds like
he was moving on
and was in love with someone else.
Yeah, and it seems to be
the thing that people
have a problem with.
There is also
a strong possible link
to the poison.
Maybe Mary ordered it
for Garfield,
and Bill then used it
against her.
Or maybe he bought it.
Either way,
he would potentially know
what to do with it.
I mean, remember how
Mary's sister mentioned
that Bill had experimented
with growing marijuana
back in the 80s?
Actually, the letter of intent
to the supplier
to get the colchicine
was all about
manipulating plant genetics.
Right.
And that was Bill's world,
not Katie's.
So the defense is saying
that she didn't know
anything about that.
I mean, sure.
Maybe.
Maybe she didn't.
But how do they explain away
all of the digital stuff
tying Katie to the colchicine?
Like, there's so much.
Her defense attorney, Pelley,
he goes after that, too.
He says that
the state's forensic expert
is unqualified,
uncertified,
a college student
who cherry-picked data
to fit his theory.
And he argues that
the digital trail
isn't as solid as it looks.
I guess the Conleys' home Wi-Fi,
which Adam actually set up,
wasn't password protected.
So anyone,
you know,
nearby could have used
the IP address.
So, theoretically,
they're saying someone
could have been
outside the Conleys' house
and connected to their Wi-Fi.
Yeah.
If the range was wide enough
or somebody who would have been
over at their house.
But didn't they check
all of Bill's devices
to see if he did
anything like that?
Eventually.
I mean, they had his phone records
pretty quickly.
But here's the thing.
When that Adam letter came
and then they started
looking at Katie,
for some reason,
checking Bill's devices
got put way on the back burner,
which I think comes back
to bite them
during this trial
because apparently
right after Mary died,
Bill told his daughter,
Tamron,
like not to touch
either of their home computers
because they had viruses.
But investigators didn't
collect any of this
until September 2016.
And then some data
couldn't be recovered at all.
Plus,
Bill was apparently
no stranger to computers.
He managed the network
that connected
all the computers
to the chiropractic office computers
for years.
And a lot of the stuff
was done on the office computer
and with office supplies, right?
Typewriter, envelopes.
Yeah, sure.
Katie used all of that the most.
But the defense points out
that it was Bill's office,
after all.
Like, he could use
any of the equipment he wanted,
including envelopes
that Katie had pre-stamped.
So they're trying to argue
that even though her DNA
was found under one of the stamps. That she could have done that
at any random time.
Yeah, and he just, like,
grabbed one.
Is that true?
Is that true?
Is that true?
Is that true?
Is there any physical evidence
pointing to Bill?
Uh. So, DNA results
on the colchicine bottle
were inconclusive.
So, the science
could not rule him in or out.
I thought the DNA
on the bottle was Katie's.
It was, but there was actually
at least three profiles.
So, Katie was the only one. Oh.
Like, or the only match
that could be, like,
fully identified.
And they were able
to completely rule Adam out.
But, for some reason,
not Bill,
just based on, I guess,
the sample they had
or whatever.
And, listen,
there is also a problem
with the prosecution's theory
that Katie poisoned
Mary's protein shake.
Mary's medical records
from when she was admitted
to the hospital
say that she had
a protein bar
and grilled chicken
that day.
There was nothing
in there about a shake.
Okay, but where's that
coming from?
Like, did she tell them
during intake?
Yeah, this isn't, like,
stomach contents or anything.
She comes into the hospital.
Mary's telling them herself.
She was still, like,
coherent when she comes
to the hospital.
And, sure, right?
Like, she's in, like,
the worst position
or, like, the worst. worst spot.
She's so sick.
Maybe she misspoke.
Maybe she had both.
Maybe someone
wrote it down wrong.
But Pelley offers
another idea,
that maybe Bill
could have slipped
the colchicine
into Mary's food
on the morning
of July 20th
and possibly given her
a second dose
while she was still
at the hospital.
So they're saying
she was poisoned twice?
Well, the experts
can't rule it out.
Apparently, there's no way
to know exactly
how much colchicine
Mary ingested.
But the fact that it was
in her stomach fluid
during the autopsy
indicates that it got
into her system orally
rather than through, like,
inhalation or injection.
And keep in mind,
this was after
two days of vomiting.
So the pathologist says
that the levels
in her system
were actually rising
when she died.
Like, her body
was still absorbing it.
Now, the prosecution
has an explanation for that.
They say it has to do
with the way that drugs
can shift around
in the body after death.
And their toxicologist says
a second dose
would have changed
and triggered
a fresh round of symptoms,
which did not happen.
But the defense pushes back.
Mary was on
anti-nausea medication
at the hospital.
So they are saying
that could have
maybe masked new symptoms.
And so it's just like
this ping-pong
back and forth
at trial.
But you said in part one
that Katie was at the hospital
with Mary and the family.
So if there was
a second dose,
who's to say
who actually gave it to her?
Like, what about it
is tying Bill
to this theory
and not to her?
Not Katie.
Well, because Katie wasn't. there at the hospital until Wednesday,
like closer to the time that Mary died.
Bill was the only one there with Mary on Tuesday
before she took a turn for the worse.
And Mary wasn't supposed to eat or drink or anything
while she was hospitalized,
but Bill admitted that he brought her cough drops
and an inhaler from home when she asked.
So either one could have theoretically been laced,
but it's not clear if those things were ever tested.
Although as far as I can tell, they weren't.
My head is. Spinning, I know, you're not the only one.
This trial stretches on for over three weeks
with dozens of witnesses.
The jury goes on to deliberate for nearly 24 hours,
over five days, but they are hopelessly deadlocked,
reportedly 10 to 2 in favor of acquittal.
So on May 18th, 2017, the judge declares a mistrial.
No verdict, no closure,
Katie is in legal limbo, still charged with murder.
And prosecutors aren't about to let things go.
Five months later in October, they bring Katie to trial again.
Now the theory is the same,
but this time the prosecution has a new ace in the hole.
As they prepped for round two,
investigators re-examined Adam's laptop
and they realized that one of the phone backups on it
wasn't from Adam's device.
It was from Katie's.
In August 2015, so just weeks after Mary died,
Katie had plugged her iPhone into Adam's laptop.
And without meaning to, she triggers a full backup,
preserving everything on that phone at the time,
including stuff that she later deleted.
What they found painted a picture of someone doing their homework.
In the fall of 2014, Katie started researching different poisons
and screenshotting articles about how deadly each one was.
By December, she seemed to land on colchicine.
She was researching chemical suppliers,
looked up the prognosis and treatment of colchicine poisoning,
and then ordered it using those fake documents
that she'd scanned with her phone.
To prosecutors, this is a smoking gun
and they're feeling good as everyone crowds back into the courtroom.
But I don't think they are expecting
the curveball that Katie's new lawyer is about to throw at them.
Katie's defense attorney for trial number two
is a guy named Frank Polichelli.
And he has a whole new approach.
Instead of accusing Bill, Polichelli lays the blame on Adam.
This time the defense says that Katie actually tried to help investigators
see what was really going on.
But they were so focused on her, they dismissed everything
things she told them, including her claim that Adam had confessed to her. According to Polichelli,
here's what really happened. Adam was desperate, volatile, and had a strained relationship with
his mother. And when he couldn't hold on to Katie, he concocted a plan to poison Mary in a way that
would make sure Katie took the fall. Think about it from this angle. Adam actually studied computer
science in college, and he had way more digital know-how than Katie. He had used her devices in
the past. Was it really a coincidence that her damning phone backup was on his laptop?
I mean, you got to find a way to explain that new evidence.
In Polichelli's view, Adam could have planted or manipulated any incriminating data. He had
access to the Yoder's office, too. He even had his own key, which he claims he lost.
And when police searched his Jeep, they found goggles and gloves,
and he was able to get out of the car. He was able to get out of the car,
and he was able to get out of the car, and he was able to get out of the car,
and she was scared of him. By his own admission, he had gotten physical with her,
said that he slapped her in the face a few times at a party in 2013.
If he's willing to do that in front of people, you know, what's happening when no one's watching?
And then there's the sexual assault allegation from 2014 that Katie told the detectives about
in their first meeting. Remember that? Now, Adam denies it, but he also admits that he was so
drunk that night, he doesn't remember anything.
How can you deny something you don't even remember?
Well, here's the thing. Prosecutors actually don't even believe Katie about it either.
She had given police photos of injuries that she said came from the assault,
but when investigators pulled the data, capture times told a different story.
Some were taken nearly a year before the night in question. Others were months after.
None of them matched up with when she said, like, they were supposed to have happened.
Mm-hmm.
Like this. For almost every argument the defense tries to make,
the prosecution comes back with a one-two punch. And they insist via expert witnesses who did the
data extractions that there was no digital tampering or modification and nothing pointing
to Adam at all except for Katie's word. They are confident that the right person is on trial.
But they do start to worry that some jurors might believe Katie didn't intend to kill Mary.
Just make her say it.
Like, the way Adam got sick before from who knows what. Which, by the way, even back then,
like when he got sick, he made sort of a joke, question mark, that Katie poisoned him.
Because he said that he got sick right after taking some supplements that she had given him.
Can I just say that if that thought even crosses your mind when you're in a relationship, run.
Get out. Yeah. But that half-joking, did she poison me thing, that's something that we know
from Katie's arrest.
And that half-joking, did she poison me thing, that's something that we know from Katie's arrest.
Katie's trial attorneys should have fought to get that evidence thrown out.
They didn't.
And that failure cost Katie her freedom.
And so just last year, the appellate court agreed.
In late January 2025, Katie's conviction was overturned.
And a few days later, she walked out of prison free for the first time in seven years.
Now, you know this, overturned doesn't mean exonerated.
Prosecutors can try again, and they're planning to do exactly that.
But almost immediately, they shoot themselves in the foot.
You see, when Katie was released, her attorney asked the judge to seal the case records,
which Swartz told us is pretty standard for a conviction that gets tossed.
What's unusual is that the DA's office didn't object.
And so now all of the evidence, police reports, witness statements, digital records,
all of it is locked away, not just from the public,
but from prosecutors, too.
Oh, why wouldn't they push back on that?
Dude, I don't get it.
Maybe they figured that the seal only covered the conviction and not the actual evidence,
which, like, not true.
And they should have known.
So even though they got, like, a whole nother grand jury to do the whole song and dance again,
even get to the point where they call Swartz to schedule Katie's arraignment
because they expect a new indictment soon,
they get blocked.
Because it's at that point which Swartz is like,
wait, did you unseal the case first?
Right, because, like, what are you even going to bring to this grand jury?
Because it's all tucked away.
Yeah, and that's when the DA's office has this, like,
oh, sh** moment.
They had been using evidence that they had no right to touch.
The judge orders them to stop, and now they're just stuck.
They can't even ask to unseal the records themselves because only law enforcement,
they can do that, and they can only do that if there's an active investigation.
But police have admitted that no one is currently working on Mary's case.
So from there, it just spirals.
The DA's office tries to get the judge removed,
accusing the judge of bias, claiming that at some point she said that she thought Bill killed Mary.
The judge denies it, refuses to step aside.
Then the DA files multiple appeals, all of this back and forth over months,
which brings me to. 2.
Right now.
Oh, she's still out?
Oh, yeah.
This is active and ongoing.
There is actually a hearing coming up in April.
But Swartz says that the state has been fighting the wrong battles,
that they have been focused on whether the judge was wrong
when she ordered them to stop using the sealed evidence.
But again, even if they win that, everything is still sealed.
Yes.
It's like arguing you shouldn't be able to stay out of a room that you, like,
cannot get into.
in the first place.
So they're not even getting at the real issue here.
Plus, even if they do get the records unsealed,
most of the evidence might be worthless.
Because of the. The appeals court decided that the search of Katie's phone was illegal.
Right.
They shouldn't. The evidence that's there shouldn't even be there, essentially.
So any. Yeah, anything that came from it, including the backup on Adam's laptop,
the statement that Katie made based on what cops found,
all of it can be tossed.
Wait, why the laptop backup?
Didn't they have a warrant for his devices?
They did, but there are a few problems with it.
Like, for one, the only reason they even knew to look at it
was because they had Katie's phone first.
A fruit of the forbidden tree.
Exactly.
On top of that, there's a question of whether Adam
should have even had the backup on his computer.
But even if prosecutors can use it, it's weaker now.
I mean, at trial, they verified the backup by comparing
it against the physical phone,
basically, like, matching digital fingerprints
to, like, prove nobody had tampered with it.
With the phone suppressed now, they can't. They don't have that.
They can't even do that anymore.
So you're left with, like, a backup file
that they can't independently verify
just sitting on Adam's laptop.
And think about what the defense argued at Katie's second trial.
Adam is tech-savvy.
Adam had possession of the laptop.
Adam had every opportunity to manipulate what was on it.
Without the phone to prove that those searches,
also existed on Katie's actual device,
the defense can say that the only place
this incriminating evidence lives
is on the computer belonging to the guy. This other guy. that they think did it.
Yep.
So even in the best-case scenario for prosecutors,
that backup is nowhere near as powerful
without the phone to back it up,
for lack of a better term.
Actually, it could even hurt their case.
But no matter what the path they want to take is,
the clock. The clock is ticking.
Because, unlike murder,
manslaughter has a time limit.
Swartz says that prosecutors have maybe three more years.
And if they can't retry Katie before then,
it's over.
I mean, she got acquitted on the second-degree murder, right?
They cannot go back with that.
All they have is that manslaughter charge.
And even if investigators wanted to take another look at Bill
or at Adam,
which they seemingly don't,
they're out of luck.
They both got immunity when they testified before the grand jury.
What?
I had the same reaction.
Apparently, in New York, that's routine.
Routine?
It doesn't protect you from perjury if you lie,
but it does mean that neither of them can ever be prosecuted for Mary's death.
Which, as it stands, there doesn't appear to be any evidence for anyway.
As of right now, the case is officially unsolved,
but only on paper.
Police are sure that they are. They arrested the right person.
Prosecutors are sure that the right person was on trial.
And what does Katie say?
You know, she actually did an interview within the last couple of years
with ABC News for that docuseries I mentioned in the first episode.
And I will say, her attorney told us that she feels
that when it came out, it lacked important context
in how some of it was presented.
But the way it was presented,
there were parts that I found kind of odd.
Like, producers ask her,
if she ever searched for lethal poisons on her phone.
And instead of just saying no,
she told them that she doesn't even have a reason to search for poisons
because she's not the type of person who could do something like that.
And her parents, who were also interviewed,
said that when they asked her straight up,
did you kill Mary?
Again, the answer is not no.
She basically told them,
you know I want a family someday,
so why would I jeopardize my future?
Which again, not a denial.
Like, no is right there.
I know.
But to answer your question,
Katie says that she goes back and forth.
Sometimes she thinks it was Bill.
Maybe Bill and Adam.
She just knows it wasn't her.
Okay, I'm still confused about the anonymous letters.
Oh my God.
It's like the murkiest part to me.
Does she admit that she wrote them or not?
Okay, so some people think that her initial confession to police
about writing those letters was coerced
and that she didn't actually write them at all.
Okay.
But during her second trial,
Polichelli said that Katie did admit to writing it.
But then when ABC News asked her about it,
Swartz stopped her from answering.
So you've got these like competing claims.
Either Katie wrote the November letters,
which ties her to the Gmail account
and the Colchicine order,
or she wrote the letters,
but somehow the digital trail leading to the Colchicine
isn't as airtight as investigators claimed,
or she wrote a different letter entirely,
that just never got to police.
Or she didn't write any letters at all
and her confession was coerced.
So that clears up absolutely nothing.
Welcome to my world.
I'm honestly not sure anyone has a straight answer
on all of the letter stuff.
I mean, so much about this case is still up in the air.
And our reporter Nina reached out to Bill and Adam,
but we never heard back.
What we do know though,
is that Mary's loved ones still feel
her absence every day.
And the divide between them may never heal.
I don't know if Bill and Kathleen are still together,
but Mary's other sisters that we've mentioned
have remained some of Katie's biggest supporters.
They even teamed up with the Conleys
to fight for her release.
But they live with the guilt of being the ones
who pushed for an investigation in the first place,
never dreaming that it would lead to a woman
that they now think is innocent.
Of course, the Yoders have their own burdens.
Tamron told ABC News that she struggles with the fact
that she once even suspected her own father.
And she said that Adam,
who didn't participate in the show,
may never stop blaming himself for bringing Katie
into the family in the first place.
No matter what you believe happened,
one thing is certain.
And it's really the most devastating part of all.
Mary wasn't killed by a stranger.
She was killed by someone she loved,
someone she trusted,
and someone that she never saw coming.
You can find all the source material
for this episode on our website, CrimeJunkie.com.
And you can follow us on Instagram
at CrimeJunkiePodcast.
We'll be back next week with a brand new episode.
Thank you.
Crime Junkie is an AudioChuck production.
I think Chuck would approve.
Meow.
Podcast Summary
Key Points:
Katie Conley, the office manager at Mary Yoder’s chiropractic practice, initially appeared as a witness but later became a suspect after digital evidence tied her to the colchicine purchase and the anonymous letters pointing to Adam Yoder.
Investigators found that the colchicine order was sent to Adam’s office, signed by Katie, with the Gmail account ([email protected]) accessed from her home IP address and later deleted from her phone.
Digital forensics revealed Katie had researched poisons, scanned fake documents to order colchicine, and created a letter of intent falsely naming Adam as buyer and plant geneticist—elements matching the anonymous letters.
The prosecution argued Katie poisoned Mary in a protein shake, while the defense claimed Bill, Mary’s husband, had motive and access, including a prior relationship with her sister and possible knowledge of plant-based poison use.
Katie was indicted on murder, forgery, and larceny, but a mistrial occurred in 2017 due to jury deadlock, and her conviction was overturned in 2025 after new evidence and procedural errors.
Prosecutors attempted a second trial, but were blocked when case records were sealed by the court, preventing them from using key digital evidence, including a phone backup on Adam’s laptop.
The sealed records and lack of admissible evidence weakened the prosecution’s case, and legal barriers now prevent further retrial, despite ongoing claims of guilt.
The case remains unsolved in practice, with no evidence clearly pointing to either Bill or Adam, and Mary’s family divided, unable to reconcile who betrayed her trust.
Summary:
The murder of 60-year-old Mary Yoder in 2015 sparked a complex investigation in Oneida County, New York. Mary, a beloved chiropractor, died suddenly after consuming a protein shake, with toxicology revealing lethal levels of colchicine, a gout medication she had never taken. Suspicion initially fell on her husband, Bill, but an anonymous letter pointed to Adam Yoder, who had a relationship with Mary’s sister.
The case pivoted when office manager Katie Conley, who had a long history with Adam, was linked to the colchicine order via her phone and office computer. Digital evidence showed she researched poisons, created falsified documents, and used a Gmail account tied to Adam’s email address—details matching the anonymous letters. Prosecutors argued Katie poisoned Mary, while the defense claimed Bill had motive through financial gain, prior relationships, and knowledge of plant-based toxins.
Katie was convicted on multiple counts but later acquitted after a mistrial and a 2025 overturned conviction due to illegal evidence collection. Prosecutors tried again, but were blocked when case records were sealed, preventing access to critical digital data. The state’s inability to proceed, combined with legal rulings nullifying key evidence, effectively stalled the case.
Despite the lack of a definitive perpetrator, the case remains emotionally unresolved, with Mary’s family deeply divided and no clear resolution in sight. The case underscores the dangers of circumstantial evidence, the power of digital trails, and the persistent trauma of betrayal within trusted relationships.
FAQs
The investigation involved her husband Bill, her son Adam, office manager Caitlin Conley (Katie), and Mary's sisters, who remained suspicious of Bill. The case also included detectives from Oneida County Sheriff's Office.
Katie admitted to writing anonymous letters implicating Adam and admitted to accessing the colchicine order account, but she claimed she didn't personally poison Mary. She stated Adam confessed to her, and she believed he acted out of a desire to hurt him.
The colchicine was shipped to the office with a receipt that was emailed to an address ([email protected]) linked to Katie’s home IP address. The Gmail account was later deleted from her phone, and digital evidence showed she accessed and scanned documents to create a fake order.
Adam was suspected because the colchicine was found in his Jeep with a receipt linked to his email, and an anonymous letter pointed to him as the perpetrator. However, the evidence later suggested that the letter may have been planted to frame him.
Digital forensic analysis showed that Katie used her phone to access, scan, and create documents for the colchicine order, used her office computer to search for poisons, and had a deleted note referencing the email address and password 'adam is gay.'
Bill was suspected due to his relationship with Mary’s sister and his access to office computers, but no direct evidence tied him to the poisoning. His defense argued he had motive and access, but investigators found no digital or physical proof linking him to the crime.
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