[Narrator] He was a hardworking family man
who left small-town Ohio to see his fortune out west.
He packed everything up that he could
in his little car and set out to Arizona.
[Narrator] There, he met a blonde beauty
who stole his heart.
[Mark] She was a little bit daring.
On one of their first dates, they went skydiving.
She seemed like she could be a good person for him,
and she was pregnant.
I was excited, 'cause I was gonna have a niece or a nephew.
[Narrator] But after almost four years,
their desert dreams end in a flash of violence.
He had said, "Holy [bleep]."
And I had heard gunshots.
And then I didn't hear anything.
[Narrator] Investigators unearth an unexpected betrayal...
[Shawn] She had wanted him to have nothing to do
with the baby if he wasn't gonna be with her.
[Narrator] The deeper they dig, the darker the truth becomes.
[Chris] He tells me that, "She just bit me,
and I had to get stitches."
He's like, "I, I gotta leave her.
Can you help me?"
[Michael] We're looking at the security video,
but we don't see who the driver is.
During the time that her keycard was being scanned,
she is still sitting there, eating her lunch.
The phone pings near her apartment at 1:16,
and then it shuts off.
We didn't know where she was, if she was on the run,
if she was gonna come...
after any of us.
[music]
[Narrator] December 16th, 2016.
The bedroom community of Maricopa, Arizona,
sits at the edge of Phoenix's sprawling suburbs
and the vast Sonoran Desert.
It's a little enclave that, like
a lot of the, the suburbs of the Phoenix area, has...
...has become defined, when it used to just be really
in the middle of nowhere.
[Narrator] It's just before 2:30PM
in one of Maricopa's many subdivisions,
when out of nowhere, an unusual sound shatters
the midday quiet.
[gunshots]
We had started receiving phone calls of "shots fired".
The sound of gunshots ringing out
startled a lot of the neighbors.
They immediately get on their phones and call 911.
[Narrator] Within minutes, two Maricopa police officers
cautiously approach the location.
The don't know, is this somebody who committed suicide?
Is there an active shooter on the loose?
[Michael] When the first units got on scene,
they observed the house with an open garage door
and a Lexus sedan that was running.
[Narrator] The officers slowly advance.
[police radio chatter]
[Michael] One of the officers could see wounds on the head,
where there was blood coming out,
and shattered glass on the left side of
the driver's side of the car.
[Michael] The officer opened the door, and...
...tried to see if the individual was able to make
any kind of response.
It was clear that the victim was, was deceased.
[Michael] In his car, they found his wallet.
And the license said Michael Agerter.
And the picture on the driver's license
matched the driver.
[Narrator] Moments later,
as Maricopa homicide detectives arrive on scene,
a man shows up, identifying himself as Chris Grindey,
Michael's longtime friend and former roommate.
[Chris] I got the call from Mike's sister, saying,
"Chris, Chris, Chris! Something's wrong.
"He won't answer his phone.
Can you come down and take a look at what's goin' on there?"
And I'm like, "Sure."
As soon as I turn the corner and see the tape up,
I'm like, "I need to talk to somebody."
[Narrator] Chris is shocked to learn
that Michael has been murdered.
[Shawn] Michael wasn't involved in criminal activity.
He was certainly not the kind of, of person
that had, had enemies after him.
[Narrator] Chris tells police that Michael lived alone.
His sister and most of his family lived
28 hours away, in Urbana, Ohio.
However, his ex-girlfriend and their newborn son live nearby.
[Chris] I remember thinkin', "I can't believe he's gone."
He was only in my life for about five or six years,
and then gone.
[music]
[Narrator] Michael Agerter was born on July 26th, 1985
in Valparaiso, Indiana.
The oldest of four,
Michael set an example for his younger siblings.
Mike was always caring and really passionate.
He was my role model,
and I think that rubbed off on me.
[Narrator] In 2002, the tight-knit Agerter family
moved to Urbana, Ohio,
where Michael's love of sports took hold.
[Mark] I spent half my life throwin' a football to people.
So, I started throwin' it around to him,
and he picked up on things quickly.
He was part of the football team that I coached.
[Narrator] After a year of college,
Michael decided he was ready to enter the workforce.
He got a job at First Ohio Mortgage Company...
And then he ended up for the Chase Bank people in Columbus.
[Narrator] In 2010,
25-year-old Michael got an opportunity
he couldn't pass up.
He liked Phoenix, and he liked the weather.
So, he interviewed with Wells Fargo.
He accepted the job, packed everything up
that he could in his little car, and set out to Arizona.
As a parent, that's your job, to help them succeed.
But it was difficult having him that far away.
[Narrator] Less than a year later,
Michael's friend Chris Grindey also made the move
from Ohio to Arizona, and the two became roommates.
[Chris] I got divorced, and my brother was like,
"Move on down." And Mike's already out there.
So, one of my other calls was to him next sayin',
"Hey man, I'm, I'm movin' out there...
You wanna become roommates?"
[Narrator] By 2013, Michael's future looked bright.
And he wanted someone to share it with.
He had told me, "I'm gonna start doin' online dating."
And I'm like, "Go for it, dude."
I believe the very first date that he ever had that online
was with Kathryn.
[Narrator] 28-year-old Kathryn Sinkevitch
was working at a local call center in Maricopa
when she met Michael online.
Eventually, they met in person,
and their chemistry was undeniable.
[Mark] I think one of the things about Kathryn was
that she was...
a little, little bit daring to try things.
So, one of their first dates, they went skydiving.
[Narrator] However, Michael learned that
Kathryn's carefree exterior masked a tragic past.
Kathryn's ancestry is, is Russian,
her family's Russian.
She grew up, Southern California.
And I, I believe that she was the youngest of eight children.
Her parents were both deceased.
She found her mother dead on the kitchen floor
when she was 13.
And I believe her one sister took her in and raised her.
[Narrator] When it came to her painful childhood,
Kathryn preferred to keep the details to herself.
[Shawn] She kept people at arm's length.
She was definitely a, a private person.
[music]
[Narrator] After dating for several months,
Michael took Kathryn to Ohio to meet his family.
[Marlie] I was excited because Mike was coming home,
and I hadn't seen him.
She seemed like...
she could be a good person for Mike.
[Narrator] Once back in Arizona,
the couple took another big stp when Kathryn presented Michael
with a gift--
a dog they named Darwin.
He had pictures of the dog, and him with the dog,
and it was cute, like the way you would have
your pictures of your child.
[music]
[Narrator] In 2013, Kathryn moved into the Tempe home
with Michael, Chris, and Darwin.
Her personality was energetic. It was, it was bubbly.
She was a can-do person,
she definitely wanted to take initiative.
[Narrator] By the fall of 2015,
after two and a half years together,
Michael and Kathryn moved into their own apartment.
Mike helped her get her job at Movement Mortgage,
and he kinda coached her as far as getting the job.
[Narrator] In the spring of 2016,
Michael called his family back home in Ohio
to deliver some exciting news.
My mom told me that Kathryn was pregnant.
I was excited, 'cause I was gonna have a niece or a nephew,
and I begged Mike for that all the time.
[Narrator] But during her pregnancy,
Michael and Kathryn's relationship
took a turn for the worse.
Mike's very gregarious and outgoing,
and she was more kind of reserved.
She accused him of cheating on her.
Mike tried to make her happy,
but there ended up being problems.
He decided he couldn't raise a child in that environment,
and decided that it was time to leave.
He had taken a couple of parental classes,
and he was looking into buying a crib.
He thought after the baby was born,
they'd find some even ground.
[music]
[Narrator] But just months later,
this new father is found dead from a gunshot
in his own garage.
Authorities begin a sweep of the crime scene,
while investigators track down Michael's family and ex,
Kathryn Sinkevitch.
[Shawn] They obtained an emergency cell phone ping
to figure out where Miss Sinkevitch was located.
There was no murder weapon,
there was no gun found at the scene.
The investigator could see
the wound to the left side of his temple was obvious.
[Narrator] But there's evidence that wasn't the only shot fired.
They noticed that there was three casings,
on the, on the garage floor.
[Narrator] Detectives take a closer look
to find where the other two shots landed.
They find that Michael was hit not once, but twice.
It turns out that he was also shot once in the back.
The third shot apparently missed Michael.
This was a shocking event to a fairly peaceful suburb.
So, to have something like this, to have someone, you know,
shot and killed inside the garage,
it was highly unusual and startling for everyone.
[music]
[Narrator] Coming up...
The investigation uncovers shocking footage.
There's a figure dressed all in black
that runs very quickly up the driveway.
[Narrator] And authorities learn the details of
a harrowing phone call.
[Marlie] I was talkin' to Mike.
I had heard three booms.
I knew there was something wrong.
[Narrator] On December 16th, 2016,
authorities in Maricopa, Arizona discover the body
of 31-year-old Michael Agerter in his garage.
[Michael] Three bullets were fired.
One of the bullets struck the B-pillar.
Two of the other three that were fired struck Michael.
One in the left side of the head,
and then one that had gone through
a lower part of the door and seat,
and was wedged in the body in the back.
Once they had the scene somewhat contained,
they did a safety sweep of the house.
They made sure there was no other victims inside the house,
or anyone who was hiding in the house.
[Shawn] It didn't appear that there was anything missing.
Nothing inside the house looked like it had been ransacked,
like there was an attempted robbery.
[Narrator] But officers do find something inside
that gets their attention.
They noticed there was a home surveillance system
in Michael's house.
[music]
[Narrator] In order to view the footage,
investigators will need permission from a judge.
While waiting on the warrant,
investigators talk with Michael's neighbors,
who have gathered outside.
[Narrator] Most report that they don't know Michael,
who only recently moved in.
However, several do report
seeing a vehicle parked in front of his house
moments before the shots rang out.
[Narrator] But the accounts of who was driving the van
are inconsistent at best.
We had quite a few different descriptors
of the driver.
We had a Black male, we had a Black female,
we had a Hispanic female, we had a white female.
[music]
[Narrator] With minimal details on the driver from neighbors,
investigators switch gears
and take a look at the footage from Michael's security cameras.
[Michael] You could see a white minivan
parked across the street, just to the west.
The van waited across the street for a number of minutes.
Then you see a subject get out of the car,
wearing a hoodie.
[music]
They see footage of Michael's Lexus pulling into the garage.
There's a figure dressed all in black
that runs very quickly up the driveway.
[music]
[gunshots]
[music]
[Michael] And then approximately 11 seconds later,
this subject is seen running away.
In that 11 seconds, Michael was executed.
[music]
[Narrator] Between the hoodie and the angle of the cameras,
investigators can't get a look at the person's face.
Authorities are still talking to potential witnesses
when they finally get in touch with Michael's family in Ohio.
His sister Marlie reveals horrifying details
about her last conversation with Mike.
[Marlie] I was talkin' to Mike
through the Bluetooth in his car.
He had asked me to hold on,
to switch over to the phone instead of the car.
And the next thing was...
He had said, "Holy [bleep]."
And I had heard three gunshots.
And then I didn't hear anything.
I knew there was something wrong.
[Narrator] Marlie tried calling Michael again, to no avail.
[Marlie] It was very hard for me,
because I'm all the way here in Ohio.
And, and I, I had no way to help him.
So I had called my parents, and my dad answered.
And at the time, I told him that I had heard three booms.
I was worried that if I told him that I had heard gunshots,
he would think I was being dramatic.
So, we had called Chris Grindey to go make sure that he's okay.
Later we found out that the police were
at his house within minutes of when I heard gunshots.
The detectives couldn't tell us anything over the phone.
So we hopped in the car, went to my mom's house.
And my mom said that they were sending a sheriff to our house.
And so I knew at that point that he was gone.
[Narrator] Meanwhile, detectives switch their focus
back to locating Michael's ex, Kathryn,
and look up the make and model of her vehicle.
They discover that it's not a white minivan.
They discover it's a blue car
that doesn't even come close to meeting that description.
[Narrator] Even so, investigators are still eager
to speak with her.
That same day, authorities track Kathryn to a home in Mesa,
just a 40-minute drive from where Michael was shot.
[Michael] When the initial officers arrived,
they observed Kathryn's vehicle,
and they observed a white minivan.
[Kent] Lo and behold, right beside her vehicle
is a white van that meets the exact description of the van
that was used by the killer.
[Michael] So we ran that license plate,
and that came back to the registered owner as
a Bridget Hopkins in Mesa.
When we are making contact with Kathryn Sinkevitch
at Bridget Hopkins' house, it was a pretty tense situation.
[Narrator] Detectives request
that everyone in the house come outside.
Officers have to pull everyone out for safety reasons,
including Bridget, her husband, their children,
as well as Kathryn and her newborn.
[Narrator] When detectives inform Kathryn
of Michael's murder,
her reaction takes them by surprise.
One thing that struck me, she was very stoic.
We asked if she and Bridget would be willing to come down
and speak to us at the city of Maricopa,
our police department, and they consented.
Kathryn said absolutely.
[Narrator] When asked about her whereabouts earlier,
Kathryn tells investigators that she was at
the mortgage company where she and Bridget both work all day.
Kathryn said that she got up, got ready to go to work,
dropped her baby off at the babysitter's house,
got to work right around eight o'clock,
was there all day.
"I left at 5, picked my child up."
And then goes over to Bridget's house.
[Kent] Law enforcement continued to ask additional questions,
tried to get more details, and she invokes and says,
"I'm not answering any further questions
without an attorney present."
[Narrator] Investigators move on to Bridget,
who explains that she is Kathryn's coworker
at the mortgage company,
and they have known each other for about a year.
Bridget corroborates Kathryn's alibi.
We explained that there had been a homicide with Michael Agerter,
who had been in a relationship with Kathryn.
So, we were trying to establish all the different nexuses.
She was very shocked to think
that we would even consider Kathryn as the...
suspect in the murder of Michael Agerter.
She insists that she went to work,
she didn't leave.
When was asked what her day was like, she said that
she went to work,
got to work around eight o'clock...
She left to go get a lunch, she came back, ate her lunch,
and then went back to her desk
and worked there until she got off of work
at approximately five o'clock.
[Narrator] Even though they have no proof Bridget's van
is the one in the surveillance footage,
investigators aren't taking any chances.
The police had reason to suspect
that that vehicle might've been involved.
So they seize Bridget's van.
[Narrator] But they can't hold on to Bridget or Kathryn.
[Kent] So after getting nowhere with
their initial interview with Kathryn,
but still believing that,
that something wasn't quite right,
they went back to the family.
And what they discovered
really started to concern Maricopa PD and the detectives.
[music]
[Narrator] Coming up...
Investigators learn disturbing details
about Michael's love life.
She grabbed his dog and took off with him.
And it was devastating when it happened.
He got permission from the owner of the house
to install video cameras so that he would have proof.
[Narrator] Investigators in Maricopa, Arizona
are looking into the execution-style murder
of 31-year-old Michael Agerter.
While Michael's ex, Kathryn, is unwilling to talk about
their relationship with investigators,
they find that his loved ones have plenty to say.
[Marlie] When Mike and Kathryn first got together,
he said that they could have fun together.
Mike was highly intelligent,
and Kathryn's pretty intelligent too,
so they could have conversations on that same level.
When I first met her,
she really was a very nice, kind person.
[Narrator] But just months into her relationship with Michael,
Kathryn's behavior took a sharp turn.
[Mark] She would just go off and break dishes,
do crazy things, throw things around.
[Marlie] Kathryn was a very jealous person.
Once she accused him of cheating on her
with me, his sister.
And then I think she realized how ridiculous that sounded,
and...
then the accusation turned into
I helped him cheat on her.
[Narrator] Michael's friend and former roommate,
Chris Grindey, had a front row seat
to Kathryn's erratic behavior.
I saw that she really wasn't this nice person,
that she really was a controlling person.
And she started to control his actions
when I wanted to do something with him.
She was a very passive-aggressive person.
She would just make, you know, snide comments.
At that, that point I said, "I'm, I'm done.
I'm not gonna live with her,"
and I put in my notice to the landlord.
[music]
[Narrator] Friends and family say Mike held on
even as things started to deteriorate.
He always was generous about everything, so in his mind,
he wants to be the savior.
Financially, she was struggling.
He stayed because he truly felt like he wanted to,
to help her in her situation, no matter what.
[Narrator] Michael's loved ones say that the verbal abuse
eventually turned physical.
She had knocked him out...
two or three different times.
She had headbutted him.
[Leslie] He'd tell me that they had a fight,
and he didn't know if he wanted to stay in the relationship.
And I'm like, "You don't stay like that,
subject yourself to that kind of abuse."
[Narrator] In March of 2016,
their relationship was hanging on by a thread
when Kathryn revealed that she was pregnant.
I remember saying, "I hope you're not gonna marry her."
He's like, "Yeah, no, that won't happen,
but I definitely want to support my child."
[Narrator] Friends and family say that not long after
getting the news of Kathryn's pregnancy,
Michael was finally ready to break it off.
Four months after moving out, Chris got a call from Michael.
He tells me that, "She just bit me."
"I had to get stitches."
And I'm like, "Wow," and he's like,
"I, I got to leave her. Can you help me?"
And I'm like, "Sure."
He said, "This relationship can't go on.
This craziness can't go on."
[Narrator] Around eight months before he was found dead,
Michael took the dog, Darwin,
and moved into a home in Maricopa.
Kathryn was furious.
[Chris] She hired a private investigator,
found where he lived.
She had to pick a time when he was gone.
The dog door was open, so all she had to do was call him.
She grabbed Darwin and took off with him.
And it was devastating when it happened.
[Narrator] Investigators learn that Michael had tried
to take legal action of his own against Kathryn.
They discover that there was an order of protection
that Michael had filed in April of 2016
against his ex-girlfriend, Kathryn.
He got permission from the owner of the house
to install video cameras,
so that if any other incidents would happen,
that he would have proof.
[music]
[Narrator] However, Kathryn refused to let up.
Following the birth of their son in October 2016,
she launched a vicious and hurtful campaign.
He was just in the process of starting to get visitations,
and, you know, establish his parental rights.
In court, she announced that,
well, Mike wasn't the father of the baby.
I never believed that, and he, he never believed that.
The family court judge determined
that there would be DNA testing.
[Narrator] In fact, Marlie says
when she was on the phone with Michael
at the time of the murder,
he was returning home from taking the test.
He was going to prove that his son was his son,
so that hopefully he could see him soon.
[music]
[Narrator] In light of the new information about Kathryn,
investigators head to the mortgage company
where she works with her friend Bridget.
They check in with building security
and ask to see surveillance footage
from the day of the murder, and they spot a white van.
[Michael] We're looking at the security video of the building.
We see the white minivan pulling into the parking lot.
[Narrator] But a few hours later, the van leaves.
They see Bridget's white minivan shortly thereafter
leaving the parking lot at 12:34.
They see Bridget's van returning at 3:19 in the afternoon.
So, you know, a little short of three hours, it was gone.
The murder happened at 2:30, and they'd realized that
that fit into the timeline of when the van was gone,
when the murder happened,
and when the van returned to the workplace.
[Michael] Our confidence was really high that this was
the same van used in the homicide.
[Narrator] But who was driving the van?
[Michael] You can see the van,
but with the angle and the way it's driving,
you don't see who the driver is.
We were wondering if Bridget was involved in this homicide.
Movement Mortgage uses a keycard
to log their people in and out of the building.
We have Bridget's keycard again leaving at 12:33,
and then returning at 3:20.
That is in the timeframe that Michael was murdered.
Bridget told them she never left that day.
Suddenly, their suspicion was focused directly on Bridget.
[Narrator] Coming up...
Investigators uncover the identity
of the mysterious driver.
They decided they should look at any interior cameras.
They're absolutely shocked at what they find.
[Narrator] And more evidence surfaces from
the mortgage office.
[Michael] She had done research about how to turn her phone off
or hide it so that you could not be tracked.
[Narrator] December 19th, 2016.
Three days after the murder of Michael Agerter,
authorities visit the workplace of Michael's ex-girlfriend,
Kathryn Sinkevitch.
Investigators are honing in on Kathryn's coworker
and close friend, Bridget,
whose keycard shows her leaving work shortly before
Michael's murder...
Contrary to what she told police.
[Kent] They decided they should look at
any interior cameras,
that way they could actually establish that
Bridget did in fact leave.
That it was her keycard in her hand when she left.
[Narrator] Investigators view
the interior footage of the cubicles.
[Kent] They're absolutely shocked at what they find.
During the time that her keycard was being scanned,
Bridget is still sitting there eating her lunch.
When they look at the footage,
it's not Bridget that's leaving the building.
It's Kathryn who's leaving the building.
And she's using Bridget's keycard.
[Shawn] Michael was killed around 2:30 in the afternoon.
And then Kathryn is seen walking
right back into Movement Mortgage at 3:20.
They're obviously piecing that together
that it was Kathryn driving Bridget's van.
[Narrator] Over the next 24 hours,
investigators work to find more evidence
connecting Kathryn to the murder.
Detectives obtain a warrant for her cell phone records.
[Terri Jo] By tracking the pings,
they know that she left work shortly after 12:30.
[Shawn] The phone pings near her apartment at 1:16,
and then it shuts off.
The next time the phone pings is at 3:22,
when she's back at Movement Mortgage.
Her phone went dark during the time of Michael's murder.
[Narrator] It appears that Kathryn powered her phone off
during the time the murder was committed...
...a suspicion that is bolstered by
a search of her work computer.
[Michael] It showed that she had done research about
how to turn her phone off
or hide it so that you could not be tracked.
[Narrator] Four days after the murder,
detectives return to the mortgage company.
They learn Kathryn didn't show up for work,
but Bridget is there.
[Kent] Law enforcement has a suspect, Kathryn.
What they don't know is Bridget's involvement.
So what they decide to do is to press Bridget.
And they start confronting her with the fact that
Kathryn used her ID card.
Kathryn used her vehicle, used her keys to drive.
And she started breaking down and crying.
[Shawn] She didn't know that Kathryn had taken her van
and her card to go in and out.
[Narrator] Bridget admits that she and Kathryn bonded over
their troubled relationships.
She says Kathryn was determined
to keep Michael away from the baby.
Kathryn wanted him to have nothing to do with the baby
if he wasn't gonna be with her.
[Michael] She tried to show herself as being a victim
of their relationship,
saying that Michael was at fault and she was the victim.
Bridget disclosed to me that Kathryn had told her that,
"We are gonna leave these guys,
and we're gonna raise our kids together."
[Narrator] But now that she sees Kathryn's promises were empty,
she feels betrayed.
Kathryn was only using Bridget as a means to an end.
So the detectives ask her whether she'll participate
in a confrontation call.
A confrontation call is when a friend calls the suspect
while law enforcement is sitting there,
recording the entire conversation.
[Narrator] Detectives listen in as Bridget makes the call.
[Terri Jo] During the confrontation call,
Bridget expresses her great concern
about the fact that, you know, the police think that
she may have been in on this.
And Kathryn doesn't seem too concerned.
All Sinkevitch would sit there and say was,
"They can't prove that.
If I did or did not do this."
Then she finally disconnected from the call from Bridget.
[Shawn] Ultimately, because she was willing to
participate in a call, you know,
they eventually believed Bridget.
That she didn't know about what Kathryn has done.
[Narrator] After the call,
Bridget is released and is not charged with any crime.
But Kathryn's statements during the call add to
the mounting evidence against her.
With the surveillance video, the cellphone evidence,
and then the confrontation call,
we've got Kathryn in Bridget's van.
We know we've got motive.
They had enough for an arrest warrant for Kathryn.
[Kent] After being released on the 17th,
Kathryn was not heard from.
Police got a warrant to search her residence.
[Narrator] Armed with the warrant,
Maricopa police set out to arrest Kathryn.
She's not there, the baby's not there.
[Michael] We are looking for Kathryn,
and she's trying to run from us.
The US Marshals Fugitive Task Force
were tracking the movement.
They were developing a plan.
[Narrator] Coming up.
Investigators receive a lead on Kathryn's whereabouts.
Police receive a call from a friend of hers.
They said that she is on her way to his house.
[Narrator] But will it be too late?
She had license plates that she could have swapped out.
[music]
[Narrator] After a five-day investigation
into the murder of Michael Agerter,
authorities are poised to arrest his ex, Kathryn Sinkevitch.
Only Kathryn has disappeared into thin air,
leaving everyone on edge.
We all knew that she did it.
But, you know, we didn't know where she was,
if she was on the run,
if she was gonna come after any of us.
[Narrator] One day after the warrant is issued,
investigators get a break.
[Shawn] Police receive a call
from a friend and former coworker of Kathryn,
says that he's been in contact with her on the phone.
He had just received a phone call from Kathryn,
asking him if he would allow her to stay at his place.
But she said, "Don't look into Michael's death,"
which then caused him to want to know why.
So, he's concerned that she might come there and,
and kill him as well.
[Narrator] Law enforcement rushes
to the home in Avondale.
The Fugitive Task Force team rushed in and, and arrested her.
[Kent] The police seize her vehicle.
And she had license plates that she could have swapped out
to put on her vehicle was clearly indicia
that she was fleeing.
[Narrator] Authorities also find Kathryn's newborn son
safe and unharmed.
Police called in to the Arizona Department of Child Safety.
They took custody of the little baby.
At no time did she ever express any concern for the child.
She was very cold.
[Narrator] Back at the station,
Kathryn maintains her silence and refuses to give a statement.
Kathryn's arrest is good news for Michael's family,
but nothing compares to what comes next.
The paternity results came back that Michael, in fact,
was the baby's father.
Two days after the arrest, Michael's mom, Leslie,
was able to take custody of the child.
[Mark] There was crazy feelings that get bounced around.
That was Michael's son.
But, you know, it's also Kathryn Sinkevitch's son.
You know, in dealing with the whole...
situation of losin' his dad,
we need Michael's son as much as he needs us.
No doubt about that.
[music]
[Narrator] In May 2019, Kathryn's trial begins.
Prosecutors are aware of the obstacles they face.
Obviously, we wish we had the murder weapon.
[Shawn] We don't have a confession.
Almost all evidence is, is circumstantial.
[Narrator] New lab results from Bridget's minivan
bolster the prosecution's case.
It did come back and show that
there was significant gunshot residue in the minivan.
We have her taking a vehicle that was not hers.
We have her driving to her residence
during the middle of a workday when she said she was working,
turned her phone off.
We have GSR results, gunshot residue results.
[Narrator] Prosecutors allege that on December 16th, 2016,
Kathryn stole Bridget's ID card and van keys,
snuck away from work,
waited for Michael to return home,
and then fired three shots into his car.
The final straw for her violence
was, was him pushing for paternity.
[Terri Jo] The defense pretty much put up their argument
that beyond reasonable doubt was not met,
because there was no murder weapon,
and there was no real eyewitness to,
to the killing.
[Narrator] On May 7th, 2019, the jury delivers its verdict...
Guilty.
She was sentenced to natural life in prison without parole.
[Leslie] I absolutely think she got what she deserved.
But I still think that's getting off a little easier.
You know, she can have her family visit her,
call and talk to her.
But at least she's not able to do it to someone else.
[Narrator] The trial brings an end to a painful chapter
for the Agerter family.
But their grief and their love for Michael live on.
There's never closure.
There is figurin' out what you have to do,
how you have to be, to be able to move on and live.
We felt that if Mike had a choice, you know,
he probably would have willingly given his life to save his son.
But by killing Mike, she gave Mike his wish.
You know, he wanted her, wanted the baby away from her,
wanted the baby to be safe.
He's been with us since the day he was eight weeks old.
[music]