[phone ringing]
The inside of the house was scorched pretty badly.
This was an intentionally set fire.
He was stabbed multiple times.
It was very much a whodunit.
My son told me, "No, Mom, he's been murdered."
[Miller] This wasn't a home invasion.
It was somebody that was welcomed in.
The video, I mean, you can't even hope for
something like that. There's no way.
Where's she going?
[Miller] It was shocking.
[suspenseful electronic music]
[static] [suspenseful music continues]
[suspenseful music mellows] [static]
[gentle music playing]
[narrator] 56-year-old Andy McGuffee is cooking up a feast
for his stepdaughter, Amanda,
and his granddaughter, Lainey.
[Amanda] Andy came into my life when I was around eight years old
and he had met my mom and I immediately became
his little sidekick.
No matter what he was doing, he loved being in the kitchen.
It's tamale day! Let's eat.
Our favorite, Pawpaw.
He would always call me and my daughter to come up
and have us try a new recipe and we loved it.
My daughter loved her pawpaw.
[contemplative music playing]
[narrator] Andy's wife, Angela, isn't at tonight's dinner.
She has COVID and is recovering at her father's house.
[Angela] I got out of the hospital in October.
They had forecasted some very strong tornadoes,
and since Andy worked the night shift, and I was on oxygen
still, I didn't want to be there in our home by myself.
OK. That's all done.
Alright. We're gonna head out.
-See ya. -OK.
-[softly] Bye. -Bye, you!
I did speak to him Thursday evening.
Ang? How are you my love?
[Angela] He said that he would be picking me up as soon as he got
off work the next day.
And we said, "Good night, I love you."
And that is the last time that I spoke with him.
OK, bye.
[brooding music playing]
[narrator] Next morning, Andy's boss calls Angela.
Andy failed to turn up for his 1:00 AM shift.
I said, "Well, I'm very concerned because I've been
with him for 30 years, and he's never missed work
and not called."
My son, Josh, lives a few miles from our home, and so I asked
him if he would mind going over to the house and just checking
on Andy to make sure he was okay.
[rattling, suspenseful music playing]
[phone ringing]
[narrator] Blanchard police officers respond to a 911 call
from Josh.
[sirens wailing]
I think there's been a fire!
[coughing] I think there's been a fire!
The patrol officer could see that there was scorching around
the front door.
He went ahead and went inside, saw that the inside of
the house was scorched pretty badly.
He went into Andy's bedroom and saw his feet at the end
of the bed.
Even though upon initial glance, you couldn't really see how
he had died,
they were relatively certain that it was something that
they wanted us to come out and investigate
um... pretty quickly.
[narrator] Agents from the Oklahoma State Bureau of Investigation arrive
on scene along with the fire marshal.
Went into Andy's bedroom. He was covered up pretty well
He was stabbed multiple times
I'm counting at least 11 stab wounds.
We observed lacerations and cuts to the head,
to the neck, to the face, to the chest.
[Miller] Because of the widths of the stab marks,
it looked like more than one weapon that was used to
stab Andy.
We quickly came to the conclusion that Andy had
been murdered.
[emotional piano music]
[narrator] Josh calls his mom, Angela.
It was really kind of surreal,
um, because it sounded like he was crying,
but my son doesn't cry.
Mom?
He said, "Mom, Andy's dead."
And I screamed,
and, um, and I said, "Did he have a heart attack?"
And that's when Josh told me, "No, Mom, he's been murdered."
And, you know, then, of course, I just lost it.
And I was like, "No, that can't be.
That can't be. That just can't be."
[narrator] Agents searched the scene for clues.
There was, uh, uh, like a recliner.
And that's where you can really kind of first see the damage
that had taken place, because it was
burned and melted.
You can see this gigantic black spot on the floor.
The boards there were just scorched.
I mean, just completely blacked out.
You also had rolls of paper towels
all laid out,
specifically to try to spread the fire.
[Sheppard] We noticed they were aerosol cans that were put
onto the stove.
Had the fire been able to spread into the kitchen area,
the aerosol canister would have made explosions.
This was absolutely not an accidental fire.
It wasn't a mishap.
It wasn't a careless cook,
a careless dropping of a cigarette.
This was an intentionally set fire.
[Miller] Whoever this was didn't have to force entry.
I thought this wasn't a home invasion.
This wasn't somebody that kicked in the door and just
went to town on him.
It was somebody that was welcomed in.
[sustained ominous tones]
[Miller] Angela got on scene. She had an oxygen tank on.
She was using a walker to be able to get around.
My heart just went out to her,
because she was very, very sick.
Angela told us that she had spoken with Andy the night
before, around six or seven at night.
Then she was woken up the next morning by a phone call from
Andy's boss, saying that Andy hadn't arrived
at 1:00 AM for work.
So Andy was killed during that time frame.
Did you notice anything missing from the property?
Josh was able to pick up that there was a lot of property
that was missing.
There was like a laptop that was missing, purses, DVDs,
neck massager.
And Andy's white Toyota was missing.
I found out that there were a large number of firearms that
were missing from the house, including a pink BB gun.
We talked to a lot of the friends,
a lot of the family.
There was nobody that was upset with Andy.
There was nobody that had any kind of motive to hurt him
or anything like that.
So, you know, you still don't have a suspect.
It was very much a whodunit.
[narrator] While investigators put out a BOLO for Andy's white pickup,
agents worked to trace the missing items.
Agent Gatlin just happened to think,
"Well, I'll check leads online."
A database for pawnbrokers across the United States.
Hey, Matt, we got a hit on the pink BB gun.
He was able to determine that a pink BB gun had been pawned
and a neck massager had been pawned.
[narrator] The pawn shop is in Kansas, nearly 300 miles away.
[brooding music playing]
Agents review the store's surveillance footage at
the Kansas Bureau of Investigation.
Agent Hornsef, she was able to go to the pawn shop
and get video.
Play it from when the store opens.
[mysterious, tense music playing]
There. What's that?
Got the pink BB gun. And the neck massager.
These two people come in to this pawn shop in Kansas.
One of them placed a large number of firearms
on the counter.
One of them was, you know, a large individual.
Punch in.
They had items that we believed was pretty clearly
belonging to the victim, Andy.
This unidentified person then starts to converse with
a pawnbroker to try to sell that property.
Oh, there she is, she's making the deal.
Zoom in.
[Miller] They signed the paperwork.
Can we get that ticket up?
[Miller] We were able to get signed pawn tickets.
Punch in.
[Miller] And we come up with the name Debbie Senft.
Get me everything you can on Debbie Senft.
S-E-N-F-T. Mm-hmm.
We're not ready to say that these folks killed
Andy McGuffee,
but what we can say for sure is that they had property that
very much looks like Andy McGuffee's.
[narrator] The next morning, investigators receive
Andy's phone records.
[Miller] So, what we were able to see there is who Andy was last
talking to the day before the homicide, and some of
the messages that were going back and forth.
That's a lot of messages from the same number.
The text messages were trying to discuss how to
meet up with each other.
Look at this.
[Miller] The tone of the messages was that they knew each other
but they hadn't seen each other in quite some time.
Andy's conversation was very much
a social form.
Andy had even sent a picture of some alcohol that he was
drinking at his house saying you know, basically saying,
"Yeah sure, come on by."
[narrator] Andy arranged to meet this person at his house on
the night he was killed.
We got to run that number to the database.
[Miller] So he plugs the phone number in and we come up with the name.
Hey man, you're not gonna believe it.
-It's Debbie Senft. -Debbie Senft?
But I'm like, hold on a minute.
That is the same person from that pawn shop.
And so, my initial thought was, who is this person?
Why are they talking with Andy?
[narrator] Agent Miller calls Andy's family to see if they know
a Debbie Senft.
Hi, Mrs. McGuffee. This is Agent Miller from OSBI.
He asked if I knew who Deborah Senft was,
and I had never heard that name before.
Never.
Thank you for your time.
I didn't know, honestly, what to think at that point.
What we weren't able to figure out is what kind of connection
Debbie and Andy had.
You know, we don't know if it's a friend, you know,
at the very worst a girlfriend or something like that
that perhaps Angela didn't know about.
[narrator] Andy's family salvage what they can from his home.
I believe that going through the house and trying to clean
up and everything, it's hard.
It leaves a smell that you can't ever forget.
We didn't want to put mom through any more trouble
since her COVID, her breathing
and stuff like that.
Didn't want her to be around the smoke.
We wanted to see how bad it was first, before trying to
let her go in.
He had put so much hard work into that beautiful home.
It was just taken away, destroyed.
And that was hard. That was really hard.
[narrator] Agents contact Andy's neighbors to find out if they saw
anything suspicious on the night he was murdered.
[Miller] During our process of interviewing the neighbors,
one woman that we were able to talk with had said that
her husband had noticed an unusual vehicle
at Andy's house the night before.
He gave us a lot of good information.
He said that it was like a dark colored, like a charcoal
four-door sedan, and my immediate thought
was some sort of Toyota or something like that
from the description that he had given.
Another interesting point was that he had noticed there was
a large black dog,
um, in the car as well.
We looked at that as a potential source
of further evidence. You know, you think
maybe the person that's driving that car could have something
to do with Andy's death.
[narrator] Agents piece together Debbie Senft's movements in
the lead-up to Andy's murder.
They find that she rented a gray Toyota Corolla in Texas
three weeks earlier.
We were able to get the plate information for the gray car,
get that to our dispatch,
and be able to have that entered.
Uh, yep. I got it.
[Miller] A buddy of mine within the Oklahoma Highway Patrol,
he tells me there was an accident.
[narrator] A patrol officer responded to a crash involving
the Corolla at 6:00 AM,
the morning after Andy was killed.
They were able to provide, you know, copies of
the accident, the citations,
as well as the video from that accident.
Here we go.
[sustained suspenseful tone]
[Miller] The vehicle had gone off the side of the road and hit
one of the blinking signs that was on the side of the road.
He was able to provide the Oklahoma Highway Patrol
trooper with a name and date of birth.
Who is Zachary Mussett?
[Miller] During that time, he called his mom to have
her turn around so that she can pick up Zachary.
Wait, did he just say his mom is Debbie Senft?
I gotta pause it right there.
[narrator] The person seen with Debbie Senft in the security footage
from the Kansas pawn shop is Zachary Mussett,
Mother and son.
[narrator] 19 minutes later, Debbie Senft arrives
at the scene.
[Miller] Debbie arrived.
The conversation between the three parties on scene in
that accident, which is, you know, the trooper,
Zachary, and Debbie, was -- none of it made any sense.
He knows that they're acting weird, they're acting sketchy.
You can tell that from the trooper's demeanor.
[narrator] Agent Matt Miller calls Andy's family to ask if they recognize
the name Zachary Mussett.
Matt actually
relayed the name "Mussett."
I said, "Wait a minute, Zachary Mussett.
That is Andy's nephew,
who we haven't seen in 12 years."
My mom kind of lost it, and she goes, "Oh, my word,
Debbie Senft, that is Andy's half-sister."
[Angela] I said, "Yeah, if you would have said Debbie Mussett, I would
have been able to tell you right from the beginning."
I did not know if she had ever gotten married and that
her last name had ever changed.
[Miller] Our two suspects in this case were actually
related to the victim.
And that is what
is really surprising.
We had figured out that they had pawned items that
belonged to Andy in Kansas.
We then know that Zach was in an accident in Oklahoma City
around six o'clock in the morning, the day after
Andy was killed.
But what we don't know is what happened the day of the murder
and that's our job to figure out.
[narrator] Agents secure the GPS data for Debbie Senft's phone.
Lieutenant Gatlin was able to plot out Debbie's cell phone
locations and determine that she was, in fact, in the area
during our period of time where Andy may have been killed,
in between that 6:00 to 7:00 time, to 1:00 AM.
Hey, Matt, come look at this.
Around six o'clock, Debbie was at Love's Travel Stop
in Oklahoma City, pretty close to Andy's house.
We better get down there.
[footsteps] [suspenseful music playing]
[narrator] Agents search the area around Love's for clues that might
reveal Debbie and Zachary's movements during that time.
So next door to this Love's is a car wash.
We go through the car wash.
Dave! Look.
[Miller] We actually find the victim's truck.
Haha, bingo.
We were able to get a hold of the owner of the car wash.
Major Miller from the OSBI.
We need to see your surveillance footage now.
[Miller] The owner says, "Yeah, I've got video cameras
all over that thing."
[rattling, suspenseful music playing]
I started watching the videos.
Load up the outside camera
around 1:30 on the 15th.
[Miller] I wasn't quite sure what I was gonna get.
At the most, I thought at that point to get some sort of
pinpoint location that I could get some sort of forensic
information or forensic evidence for the case.
What I never could have expected is that I would have
videos better than that forensic evidence.
Wait, stop.
[Miller] On the video from the car wash, it's around 1:30,
you have them pulling in in the Penske moving truck.
But you also have them pulling in
in Andy's white Toyota Tacoma.
[brooding music playing]
[Miller] You can see them parking Andy's truck
and then parking the Penske truck at the car wash.
Switch to the inside. [clicking]
Let's zoom in.
And pause it there.
[Miller] What you see
is an inspection of several different weapons
that are in the car.
And Zach almost kind of taking stock of what they have.
Some headlights appear towards the top of the frame.
Switch to the next bay.
[Miller] Debbie then pulls the Corolla into the next stall over.
[dramatic music playing]
So in one bay, you have the Toyota Corolla...
Switch back.
[Miller] ...and then in the next stall over is Andy's truck.
And then you have the Penske moving truck that's concealing
what they're actually doing.
They both look straight up at the camera in one of the bays.
[chuckling] Can you believe it?
[Miller] But instead of stopping and moving, they just keep on
doing what they're doing.
Andy's truck had a camper shell on it.
It was open so that they could then load property straight
from the back of the truck into the Penske moving truck.
They were unloading Andy's stuff and putting it in
their truck, figuring out what they wanted to keep,
what they didn't want to keep.
Pause it. Zoom in.
There, the neck massager from Andy's home.
[Miller] Because I've been involved in this case from the very
beginning, it's very exciting, especially whenever you start
recognizing things that are actually coming out
of the truck.
Take me to the outside camera.
[Miller] And on the other side of the car wash, you can see them actually
throwing property away in the dumpster in the back.
It was really cold-blooded that anything that they had taken
from Andy that they didn't necessarily want,
they just threw away in a large dumpster behind the car wash.
Take me back to the inside camera.
Wait, what's that?
Zachary pulls out a knife from the truck, walks off screen,
and then comes back wiping the knife off on his pants.
That could have been our murder weapon.
He was destroying evidence.
They spend four or five hours unloading property
into this Penske.
Once you can kind of tell they're starting to wrap up,
they're about to leave,
they start wiping Andy's truck down
in the anticipation that somebody is going to find it.
And so you can see them kind of going through in their mind
everywhere that they've touched, which is like,
you know, the handle on the camper shell,
the door handle.
You would never in 1,000 years say, "Well, yeah, I hope
they, we've got a video of them driving it in, and then trying
to destroy evidence by wiping their fingerprints
off everything." There's no way.
[narrator] Debbie and Zachary leave the car wash at 5:30 AM.
[Miller] It's pretty clear at that point that there were no other
suspects other than Debbie or Zachary.
So that's when the decision was made to go ahead and type up
that arrest warrant.
[narrator] The family are left reeling after receiving the news that
Andy's half-sister and nephew could be involved in his murder.
It was extremely difficult for me to comprehend, because
they had dropped so far off of my radar.
You know, I mean, as far as I knew, we had no contact
with them at all.
There were no words to explain how shocked we were that family
members could do that.
[Angela] It was hard to wrap my mind around it, all of it.
Just to know that someone in his family was capable of that
just made it too hard.
[narrator] Agents ping Debbie's phone to pinpoint her location.
It reveals that she's in Wyoming.
Agents call local law enforcement to make the arrest.
[Miller] Wyoming enlists a couple of their guys to kind of wait in
a certain part of the state that they assumed that
they would probably be traveling through.
And they just waited for a Penske truck to come by.
You got eyes on 'em?
They confirmed pretty easily that Debbie was driving
the truck, and then radioed their counterparts on
the highway patrol.
When the moment's right, bring him in.
Hands where I can see 'em!
Step outside of the vehicle slowly.
Keep your hands up.
[Miller] It was very peaceful.
Neither one put up a fight or anything like that.
Slowly.
Turn around, hands behind your head.
[Miller] And we were able to get Debbie and Zach taken to jail.
[Officer] Alright, let's get this thing towed.
[Miller] Debbie is one of the more unassuming people that
I've ever arrested, but Andy was stabbed multiple times,
so whenever you have somebody that was stabbed that many
times in a brutal, brutal attack,
you know you're dealing with a very dangerous person.
One of the biggest questions that I had was the motivation,
because at that point, you know, we had no idea what
they might say.
[narrator] Agents travel to Wyoming.
They analyze the moving truck that Debbie was driving at
the time of her arrest.
[Miller] So we found not only his ID in his wallet with his debit cards
and things like that, but we found, you know, one of
the guns that was reported missing that we had
a serial number for.
We found a wedding picture.
There was a large gun case.
But there was all kinds of stuff -- glasses that were
wrapped in dish towels.
And I thought to myself, why would you steal that?
Like, if it was not nailed down, they took it.
[narrator] Next, the agents interview the suspects.
They start with Zachary.
[Miller] The first thing that I noticed about Zach is that he was
wearing the exact same clothing that he was in
the Kansas pawn shop video.
[narrator] Zachary tells the agents that he and his mom, Debbie,
were relocating from Texas to Colorado.
Zachary described stopping at different churches to try to
get gas money, as well as looking for handouts for food
or anything else that they could possibly get from
the goodwill of others.
They paid Andy a brief visit on their way through Oklahoma.
I said, "Well, okay, well, what were you driving?"
And he tells me, "A four-door gray, like, Toyota Corolla."
So that shows you you're on the right track.
The neighbors had told us there was a large black dog
in the car.
So I said, "Chance, you had any dogs or anything like that
with you?" And he's like, "Yeah."
So you have another little grain of sand that lets
you know that you're on the right path.
So you stayed with Andy for an hour, two max, right?
That's right, and then we hit the road.
So what did you and your mom do for those few hours
you were with Andy?
[Miller] He told me that he was eating eggs and sausage at
Andy's house,
which was a valuable piece of information because we found
plates of food that had eggs and sausage.
Agent Miller reveals to Zachary that Andy McGuffee was
murdered, and his home set on fire.
Was there some sort of disagreement?
Did a fight break out?
Can you tell me what happened?
But whenever we got to the part where Andy was murdered,
he would just say he doesn't remember.
So you move on past that until I show him a picture of him
inside the pawn shop. And I say,
Is that you?
-Yeah. -Who's that with you?
That's my mom.
"What were you guys doing?" "I don't know."
"Well, let me show you some of this video."
Do you agree that it looks like you're pawning something?
"Yeah." "What are you pawning?" "I don't know."
Where would you get that sort of stuff?
[Miller] "I don't know."
So it's pretty clear at that point, that even with pressing
or whatever you can do or tips or tricks that you can try to
get him to tell you the truth, that
he's probably not going to.
[narrator] Next, agents interview Zachary's mother, Debbie.
[Miller] Debbie was certainly the leader of the two.
I mean, he was her adult son.
I mean, he was twice the size that she is in both height
and weight, but she was definitely calling the shots.
Do you know Andy McGuffee?
She says, "Yeah, well, that's my half-brother."
Zach just told us you went to see Andy.
[Miller] I just tried to point out what we already knew, along with
some of the information that Zach had told us, to see if
she would change her story.
I ain't saying no more.
I want my lawyer.
And what that ultimately ended with is her just asking for
a lawyer, so the interview pretty much stopped after that.
But by that point, we do believe that we've got
enough information.
So Lieutenant Gatlin and I charged both Zachary and Debbie
with murder in the first degree and arson.
[narrator] February 14, 2023,
Debbie Senft and Zachary Mussett stand trial for the murder of
Andy McGuffee.
Prosecutors stepped through the events that led
to his killing.
The night that Andy was murdered, what they ended up
doing was parking the Penske at the Love's, and then taking
their rented Toyota Corolla out to Andy's.
We know that they were at Andy's house.
We had found the plates of food
more than one person had been eating.
[intense suspenseful music playing]
One of them probably distracted them, the other hit them,
and then they both stabbed him.
So Debbie and Zach both then load up all of his possessions
in his own truck
and their car.
We believe they probably moved Andy's body from the living
room to his bedroom because of how he was positioned and how
he was wrapped up in the blanket.
And then they went to great lengths to try to set this fire
to make sure that it would burn the house down.
[door slams]
[engine revving]
They go back to their moving truck with two car loads full
of Andy's property. in the late, late hours.
They spend a long time unloading property from
Andy's truck,
and they leave around 5:30 in the morning.
Debbie and Zach made it to Kansas,
where the pink BB gun had been pawned, and a neck massager
had been pawned.
They kept going north up through Nebraska.
Three days later, they were caught in Wyoming.
Hands where I can see them!
[Miller] The motivation very much looks like it's just...
...theft.
They made it very clear that they were very short on funds
at that particular time, and that was what they knew
that they could do to get money.
I mean, that's just to take somebody out of this world for
all their possessions is just a hard pill to swallow.
In the multiple times that I've had interaction with them,
there was never any sign of remorse,
never any tears, nothing.
[narrator] The jury finds both Debbie and Zachary guilty of
first-degree murder.
The judge sentences them to life in prison without parole
for Andy's killing and 35 years for arson.
[Angela] That was a relief.
I'm actually grateful that that's the sentence that
they went with.
A lot of tears and a lot of smiles.
[Miller] I don't think it's overstating anything to say that the videos
of them unloading and loading stuff at the car wash was
a nail in the coffin.
[narrator] Investigators found no evidence that any of Debbie's brothers
had knowledge of or involvement in Andy's murder.
[soft piano music playing]
I'm both sad and angry that Andy no longer gets to be here
to watch all the grandkids excel in life,
that they don't get to have their grandpa to go fishing
with, and have him cooking up his awesome food.
He cherished all of his grandkids.
I'm pretty sure my mom still cries every day.
I'm almost positive she still cries every night.
I know she's got the last voicemail that
he ever left her.
It would surprise me if she still doesn't listen it
every day, just so she can have his voice.
[Angela] The impact that it's had on me, for certain, is devastating.
I really think he was one of a kind.
I used to say he was my whole package, my whole package.