Dr. Insanity - Parents Discover Their Daughter Is A Mаss Killer

Episode Date: August 13, 2025

Go to https://buyraycon.com/DRINSANITY to get 20% off Everyday Earbuds Classic. This video was sponsored by Raycon. Some of the links may be affiliate links. This is Natalie and John Shirilla, the parents of Mackenzie Shirilla. Just hours earlier they were informed their daughter was involved in a car accident, and that she was transported by helicopter to the nearest hospital. However, what they’re about to hear from this officer, would change the course of their and McKenzie’s life forever. This video was made for educational purposes only. The video is presented to provide genuine footage of police incidents to promote transparency in government while providing educational, informative and newsworthy content allowing viewers to examine and assess public safety material. This is a fact-checked documentary using authoritative sources. Learn more about your ad choices. Visit megaphone.fm/adchoices

Dave, what did they tell you? Nothing. Okay, she was light lighted here. This is Natalie and John Sherella, the parents of Mackenzie Sherella. Just hours earlier, they were informed their daughter was involved in a devastating car accident and that she was transported by helicopter to the nearest hospital. However, what they're about to hear from this officer would change the course of their and McKenzie's life forever. Okay.

No. What was there? You want to sit down. Oh my God. Oh, dear. What do you say this? Progress in Alameda, a car into a building, to her deceased in the vehicle, daughter's driving.

Who died? Mackenzie's boyfriend, Dom Rousseau, as well as their friend Davion, were pronounced dead after the crash, making McKenzie the suspect of a potential double murder. However, police... police had their doubts. Most assumed that this was simply the result of an innocent mistake on McKenzie's behalf. But as the investigation would progress, dark and disturbing secrets would reveal this was clearly much more than just an accident.

Stop, if you do not open, like, I mean you think I'm joking. What do you mean? You know exactly what I mean. You're going to come open this door right now where there's going to be a serious problem. 17-year-old Mackenzie Sherilla, her 20-year-old boyfriend Dominic, and their friend Davion are on their way to a high school party. With McKenzie's 18th birthday in just two days, the group has decided to go out and celebrate. But what seems like a normal night out will in a few hours turn into one of Ohio's most disturbing mysteries. At around 2 a.m., McKenzie and Dominic are seen smoking at the party,

and at one point, McKenzie reportedly offers the host of the party's psychedelic mushrooms. This was unlike McKenzie, as her friends had never seen her use a substance before, let alone pass them around. At 3.30 a.m., the group leaves the party and drives to another friend's place across town. There, they hang out for a little over an hour watching South Park. By 5 a.m., McKenzie decided it was. time to go home. Strangely, she asked to drive instead of Dominic. This was unusual, but Dominic agreed. Additionally, when Davion asked for a ride, McKenzie refused to let him in the car. After an

argument, Dominic convinced her to take Davion home. All three of them would get in the car, sealing their own fate. At the intersection between Pearl and Progress Drive, CCTV spots the car making a turn off course from Davion's house. Instead of driving a long Pearl Drive, the car turns onto progress drive, a road that ends abruptly with a brick wall. CCTV would spot the car rapidly start accelerating, going from a calm 30 to over 90 miles per hour.

In the very last seconds, an intense turn would take place, leading the car to narrowly avoid slamming into a tree, but it would be too late, and the car would speed into the brick wall. The crashed car would remain undiscovered for 45 minutes, until 6.15 a.m., when a passerby on a motorcycle, would discover the destroyed vehicle. About 10 minutes later, law enforcement would arrive, and through their body cams,

we can witness the horrific discovery they would make. No one's breathing. Busted window out. All right. Oh my god. We can hear my boy. We're in here. Drivers.

Ah. Yeah. Bring it out. Oh, shit. Yeah. Oh, shit. Yeah.

She's a bad guy. We got to get her out. Here, me. All right. Let's see her knife. Let's cut this thing out. I don't. I don't feel anything.

I don't feel a pulse. She's breathing. It's our stomach. Her stomach's cool. Oh, yeah. We've got two that are gone. Yeah. Okay. I know.

Jesus Christ. Christ, that's the worst I've ever seen. How old is Dominic Caruso? 17? 19. Press and peace, buddy. Inside the car, officers quickly confirmed two victims as deceased, 20-year-old Dominic in the front passenger seat and 19-year-old Davion in the back. But one person has survived, the driver, Mackenzie Shirella.

As medics and firefighters rushed to tend to the victims, investigators begin trying to understand how such a devastating crash could have happened. That's when they start uncovering alarming details. It looks like they even went off the road up there. They did. But, I mean, they were, I mean, if you're hitting a building that hard, I just can't believe all the people that work up here that are up here all night long, no one heard.

They're in factory type settings. Yeah, well. And it's dark over there. That's insane, though. Once they get her out, I'll go over to this building because I think there's a camera on the front that building. I don't know if it's working, but I can always ask. As authorities work to save McKenzie,

the man who initially called 911 to report the incident arrives on the scene to give his side of the story. I appreciate you giving us a call. Someone in it, obviously? Yeah. Yeah. Yeah. That's a bummer. I didn't want to get stuck and I'm like, I don't know what's going on.

Right. No, I appreciate you giving us a call. Absolutely appreciate it. They must say, they fucking were hitting it, man. Yeah. I mean, obviously. Like, because I saw that front end. They definitely hit it hard. They'll get destroyed. Right.

All right. Well, what a way to start your sun? I guess better than theirs. Right. I appreciate the call, sir. Thank you. Officers would file the crash as an accident, stating that the driver appeared to have attempted to steer off course,

but was unable to regain control. Mackenzie was diagnosed with a condition known as pots, which can cause dizziness and fainting. Something officers believed may have contributed to the crash. The presumption was that a combination of McKenzie's medical condition and drug use had likely led to the tragic crash. However, one detail worried officers. There were no signs of breaking anywhere, and officers would soon begin to discover why. I've personally been told that she did food on him.

She was scared that she was going to make him crash the day before the actual crash. I feel like that's what she was trying to do was curse the car into the wall. As police continue gathering evidence from the crash site, one officer heads. to the hospital to speak with McKinsey's parents. At this point, all they know is that their daughter was in a serious accident. Oh, God, help me. What did they tell you? Nothing. She was life lighted here. Yeah, that one or that. Okay.

No. What else was there? You want to sit down. Oh my God. Oh, dear. What's the way to say this? Progress in Alameda, car into a building, to her deceased in the vehicle. to see some of the vehicle. Daughter's driving.

Who died? I don't know whether, but there's one that we don't know. His name's Jacob. Don? No. Stop. What I'm Tom? Guys. I know. We've been dealing with this. Your daughter's okay. She's talking to us.

I talk to her. Okay? Your daughter's alive. Okay. Your daughter's alive. She was driving. Okay. Who is it? Jacob and who? What's the name? You said? What's the name you said?

Don? Might be. Stop. What's his relation to... Okay. Yeah, then Don was in the car. Stop. Oh, my God.

What? Are you kidding? It's right now. It's ongoing investigation. Speed is definitely a factor. So we're drugs. Dom is dead. Is that what you're saying to me?

Look at me. It's not what you're saying? It's dead? There's no way for me to say anything right now, man. Don's done. a serious situation. Dump with curly... No answer.

I put the same dump. Maybe it's a different dog. It could be a different dog. What's that? Do she know about third? No. Not alone. We're going to keep it that way for her.

She's getting worked on now, okay? Full transparency here. There's drugs in the car. She had a bag of mushrooms on her and a scale. Full transparency, guys. I'm sorry. I'm ripping the band. Drugs in the car.

So she wasn't away but not away? So she was away, in and out of consciousness? She could be fully extracted from the vehicle. I-F-D. I know she has a severe leg injury. Like I said, she was speaking, and she had her seatbelt on. Mackenzie was the only one in the car wearing a seatbelt, which was why she was the sole survivor.

If her intention had been s-side, it's unlikely she would have taken that precaution. This detail would later become important to the investigation. Yeah, it had probably saved her life. 100% saved her life. I don't believe the other stuff. Mackenzie's parents would take the news relatively well, relieved their daughter had survived, but officers now faced a much harder task,

telling Dominic's parents. Remember, at this point, they didn't even know their son had been in an accident, let alone that he had passed away. Hi, Christine. Hey, can I talk to you real quick? Yeah. There was an incident that we believe Dominic may be involved.

What? Both Daviant and Dominic are deceased. Oh God! Oh God! Oh, God! Oh, God! Just sit out. Oh, God!

Let's sit down. Oh, my God! Go ahead take a seat. So, um, what time is up in there? No, we don't. Right now, what we do know 100% is somebody called it in, somebody passing by at a, around 615, 630. Oh, good, what the power's to smash somewhere? Yeah, so, so what it appears that happened is they were going westbound on progress from Pearl Road.

They went. Right here in Ston'sville? Yeah, in Strongsville. That business that's right at the, on Alameda, right where's progress ends, that's dead ends right there. They hit that building. They hit the sign out front, and then they hit the building. I don't know. We don't know that.

We don't know that. So two kids are dead, my son's dad, another kid's dad, hit the girls in the hospital? She's in surgery right now. Oh, my God. I know, Chris? I mean, another family member or a friend or anybody that you might want us to call on your behalf?

No. This is a fucking nightmare. Is somebody called in at 6.30 in the morning? It's like 6.15. 6.30, yeah. Came upon and passing it by? Oh, my gosh. This is from the normal. She was in her car?

It was in McKenzie's car, yeah. Yeah. Oh, my gosh. Is she naked or you guys don't know? Right now we don't know. She's in surgery right now. don't know. What a fucking nightmare.

Three weeks would pass, time that McKenzie would spend in the hospital recovering. Her condition would improve significantly, eventually allowing her to leave and return to her normal life. The community mourned the tragic loss of Dominic and Davion and expressed sympathy for McKenzie who had just gone through the trauma of losing both her boyfriend and a close friend. Soon, strange things about McKenzie would start to surface. In the weeks that followed, it seems McKinsey thought everyone concluded the crash as a tragic accident and nothing further.

Mackenzie would never attend Dominic or Davion's funerals. On social media, she would brag about her drug use, claiming she could, quote, do more drugs than anyone and still live. And then, on October 31st, 2022, Mackenzie would go to her first party since the crash, and her costume for the night would be a detailed corpse with fake blood smeared across her mouth. Mackenzie's parents even went public to defend her outfit, saying she, quote, deserved to have some fun after the accident. There also appeared to be a mysterious source of income. McKenzie was spending thousands of undocumented dollars on designer clothing, and she wasn't hiding it either, openly bragging about it online.

But lucky for McKenzie, this strange behavior still wasn't enough for police to launch a full investigation. However, that would all change when Dominic's family came to the police with a video taken from Dominic's phone. A clip recorded just 10 days before the crash, one that would change everything. But before we get to that, I want to tell you about the best earbuds I've ever used. If you're like me, then you love listening to True Crime Podcasts. Maybe at work, at a cafe, or on the train. I listen to them all the time when I'm traveling, but there's one problem with that. The noise.

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But it would be one video submitted by Dominic's parents and filmed by Dominic himself just 10 days before the crash that would turn the entire case on its head. Dom, if you do not open, like, you think I'm joking. You think I'm joking. You think I'm joking. Like, I'm dead ass. You're going to come open this door right now, or there's going to be. be a serious problem.

This was a short snippet from a 15-minute video where McKenzie clearly and continuously threatens Dominic. But this wasn't all. Dominic's family would show even more disturbing material, including text messages confirming confirming she had threatened to kill Dominic. This was enough for officers to reopen the case, now investigating it as a planned double homicide. At this point, this is a homicide investigation, and so we are trying to show that he intentionally drove the car into the wall. Shortly after the investigation began,

police would begin interviewing several of McKenzie Shirella's friends, family members, and individuals from the community. This would prove to be very insightful. Officers would first bring Tyler McKenzie's former boyfriend in. Unfortunately, his accounts would only serve to deepen their concerns. We understand you're not under arrest. Yeah. You walk out anytime you want. We have approximately 10 questions that we wanted to ask you.

How long were you guys in our relationship, you and her? Well, we were all friends in a friend group at first. I ended up dating her for a little bit like probably over the summer. I was only dating her for probably like a month and a half or like two months. And then, um, me and Dom found that she was, like, she was cheating on us, basically, but it wasn't like anything official, so it wasn't a hard feeling, like, with whatever happened. I just kind of was like, after me and Dom found out about that, we have no problems with each other and nothing. But like, they kept, they were on and off, and I kept on talking to her still while they were on and off

because we were all still in the friend group and stuff. So, and then we kind of just like stopped being intimate, you know what I'm saying? and we're just friends. So describe the relationship. What was it? What was she like as your girlfriend? Like, I don't really have much with her relationship-wise, because we didn't take that long.

But, like, friend-wise, like, she was crazy, like our... She, like, mentally, just not all there? Yeah, I don't think she's just mentally all there. Like, I personally feel like she was trying to kill herself in that crash, and she failed on doing so. Why did Downs put up with this? Do you know? I've personally been told that she did voodoo on him.

She has told people that she's put a spell on him so that he couldn't break up with her. That she had like grabbed a piece of his hair and that she had a doll in her room for Don. And that she had literally put a spell on him, but she would tell everyone. And like she truly believed in that kind of stuff. And she also uses the pendulum, I know too, to try to get answers to, but she tries to use it not to talk to Don. Do you think McKenzie has it in her to drive a car into a wall? I mean, if you guys speculate that she did it on purpose, do you believe she has it in her? I feel like if she thinks that she can just drive the car into the wall and not feel nothing.

You know, like I feel like the only reason she survived is because of how small she is, like, I feel like she got insanely lucky, but at the same time not let her to survive that because she killed two people. that was what she was trying to do, but it's like, I kind of feel, I feel like that's what she was trying to do was crush the car into the wall. By now, a far darker picture of McKenzie's actions was beginning to take place. This is when two friends who had attended the party would come forward to police, claiming they had evidence that, in their view, proved the crash was no accident at all. I just want to show you. Oh, no, explaining. So this is when they were going down in Progress Drive. And then you know how there was like,

tire tracks before it, like on that side grass. So that's the sign. That's when it hits the sign. And then that's where she curved exactly right on. Gotcha. Missed those two rocks and went right into the sign, the side of it. She went right into that wall. Right.

So you can see like the hard braking was right at the wall. And then her high speed was after the heartbreaking. Right. Yeah, 90 miles for outland. It looks like the person in the front seat tried to turn the wheel. because of the fact they were going to go straight into a law. And it doesn't say she heart broke once. It was 90 miles per hour down that whole road.

And I also think because of Kenzie's in Dominic's history that they were fighting, I think Davian went on his phone to distract himself from the fighting. Although they were on drugs, they can also still be fighting with being on drugs. While the statements were deeply concerning, investigators still didn't have enough concrete evidence to determine McKenzie's intent. Without a documented pattern of behavior, it was still possible the crash had been a drug-induced accident. But that changed during an interview with Dominic's brother, who provided detectives with crucial information about Dominic and McKenzie's turbulent relationship.

The following video includes talk of self-harm. Viewer discretion is advised. You mentioned that anytime Dom would kind of want to break up with her, she'd kind of go crazy. Describe crazy, like, what kind of crazy? Like, there is times where she called Dom and said, if you break up with me, I'm going to do it. Word for word.

There was an instance literally a couple days before the crash that she was hitting him on the highway while driving, and he had to pull his car over on the side of the highway, not in a very safe parking spot either, and have somebody else come pick them up and drive the car home because he was scared that she was going to make a crash. And that was just priors the day before the actual crash. Apparently, just days before the crash,

Mackenzie had threatened Dominic's life, saying she would crash the car they were in. Dominic's brother continued the interview by giving officers a compelling motive for why the crash may have been intentional. If you're going 94 miles an hour, you don't have a very fast car to begin with. You were stomping that gas permits that whole entire time. There's no brake marks on the street at all. Even before the hit, you would think that some type of instinct would kick in and slam on the brakes. But to my knowledge, she went straight into it off of what I know. off my assumptions. Dom tried to break up with her multiple times, even in July.

I kept not, like, working out, whatever, they kept making back up. Kenzie's known to be the kind of person that she's, like, she's let us know. She will never let go of Dom. And if she has to let go of Dom, she will not go on living herself. She's pretty much let that be known. McKenzie's actions after the crash were also of concern to police. On August 6th, only a week after the incident, police would be called to McKenzie's house by her father. There, he would make concerning statements. While there is no footage of the incident,

the officer that was called out would retell the strange incident in an interview. Sarge, I want to ask you first about August 6th, if you recall. That's the day you guys were dispatched to McKenzie Sherilla. The room, can you tell me about that day? So we were dispatched up to the room for disturbance. Once we arrived upon the room, she was upset with her dad. We asked the dad to step out, and we're trying to calm him down, calm him down, and he's like, you know, you guys probably know who I am. At one point in the conversation, and he's like, I feel like my daughter needs a psych evaluation.

And he's like, you know, because, like, you know, she's not, you know, thinking clearly and word for word, what he said, like, I don't recall every word that he said. He was pretty hysterical. He was pretty upset. She was upset with her dad because, like, she wanted to leave to go to the funerals. During this interaction, it became clear that McKenzie was deeply upset with her father, Despite creating a shrine for Dominic, regularly posting on his Facebook memorial page and wearing his clothes,

her father hadn't allowed her to attend Dominic's funeral. It appeared that McKenzie was truly mourning his death. But around this time, police managed to gain access to her phone. What they uncovered didn't just explain her mysterious source of income. It also hinted at something far more disturbing. After decrypting McKenzie's phone, investigators discovered several photos of her, posing with large sums of cash, despite having no documented job or known source of legitimate income. They also found fake IDs, seemingly intended to help her pass as an adult.

But most concerning was a Snapchat conversation dated July 22nd, 2022, in which McKenzie quoted $1,000 for pictures and $2,500 for an in-person meeting to do, quote, anything you want. Taken together, the materials painted a deeply troubling picture. On top of this, her phone revealed numerous examples of reckless driving. Videos showed her speeding, smoking marijuana behind the wheel, recording Snapchats while distracted, crashing during a practice run and laughing about it, letting go of the steering wheel, and even bragging about driving recklessly. But in November, detectives would discover evidence far beyond any reasonable doubt.

After analyzing McKenzie's phone location data, investigators were able to retrace her movements in the days leading up to the crash. That's when they made a dark discovery. Just days before the incident, McKenzie had driven down the exact same road seven times, heading straight towards the same brick wall. She had practiced the route. Officers believed they had gathered enough evidence to prove McKenzie had planned the murders. On November 4th, 2022, more than three months after the incident, officers were

dispatched to arrest 18-year-old McKenzie Shirillah. Where you see? I'm back there, pal. Hi, McKenzie. Step out for me. I'm Detective Hazoo. I'm the one who's been investigating the crash. You're under arrest for aggravated murder times too. Okay. Nobody's going to ask you any questions. Nobody's going to bother you. Can I have your key, please. Could you please be careful taking this one off so it doesn't break the bracelet? You got it. You got it. You got it.

The same right by the black mat. What's your first name? Okay, Mackenzie. I'm gonna take your handcuffs off. I need all the jewelry and everything come off, okay? I can't wear any of it. No, I need you to take it off while you're in jail right now. Mackenzie's parents would soon find out about her arrest and immediately drive to the police station and desperately confront the police, but it would all be too late.

I would need to speak to my daughter because you guys aren't allowed to speak to her at all. That's from the Lord. How you guys did this Sunday weekend is just, well, you like to do us go, hey, there's a warrant for, we would have brought a rig down here with you know, I don't know what you'd have. Unbelievable. So the war was issued today's rule. Wait, you've made a phone call, couldn't you? You had your creeper out in front of my yard watching. So she can't take any, she's an adult, she can't take any phone calls right now.

Okay, well, I still need to speak to my daughter, so she understands what her. Not saying anything to you guys. I mean, if you had to roll out the whole mask to pick up from the 18-room girl, we can hardly walk. Out of a hospital, but is it, it's just beyond me. So we follow the law, and that's what we're doing today. Yes, am I going to be allowed to have two-minute conversation with me? You cannot talk to what her fault is. Why doesn't she get a phone call?

She has legal brought in. Why don't she get a phone call? She was just brought in. They're going to process a phone call. as soon as they get the time for her to make a phone call, she would be able to make a phone call. She's a lawyer. She is 18 years old, and she could speak that.

Yeah, but she's a dumb 18-year-old that just turned to 18. And this guys are going to take advantage. She's not allowed to speak to you guys. I'm coming you, dad. Her attorney can call us. Don't ask her any questions. I'm not allowed to speak to you. Her parents don't want McKenzie to talk and demand a lawyer as present.

McKenzie is going to need that lawyer, as she's going to have to face the consequences of her actions in a court of law. She's tried as an adult and decides not to be tried by jury, leaving her fate to a judge. Despite the defense's claims that she lost consciousness, the evidence against her proves this claim was a lie and the prosecution believes she crashed the car

as an easy way out of the relationship. The judge agreed, and on August 14, 2013, McKinsey's fate was finally sealed. This is the type of evidence you can never unseed. You can never forget the visual or audio of this exhibit. It's chilling and tragic. As you review that exhibit, you know that you are watching the oncoming deaths of two people, and there is nothing that will stop it.

Exhibit 802 crystallizes the deadly decision-making of the defendant. She morphs from a responsible driver to literal hell on wheels, and she makes her waved down the street. The mission was death. McKenzie alone decided to push the pedal to the floor and demand the ultimate speed of that vehicle to 90 to 100 miles per hour. McKenzie decided death was the ultimate goal that day, and she alone made that decision for Dominic and Davian, and she continuously acted for the matter to her shooting purpose. In the early morning hours of July 31st, 2022, her purpose was to kill Dominic Rousseau and Newfoundlandland. Her actions were controlled, methodical.

methodical, deliberate, intentional, and purposeful. This was not reckless driving. This was murder. On August 14th, McKinsey was found guilty on four counts of murder, four counts of felonious assault, two counts of aggravated vehicular homicide, one count of drug possession, and one count of possessing criminal tools.

She's facing 15 years to life, and is currently being held in the Ohio Reformatory for women. Her first opportunity for parole will come in October of 2037.