The Real Life Dexter Copycat Killer
The disturbing phenomenon of copycat killers has blurred the line between entertainment and reality for decades. In one of the most chilling true crime cases, Mark Andrew Twitchell, an aspiring serial killer from Canada, became obsessed with the hit TV series Dexter, modeling his crimes after television’s infamous vigilante.
On this episode of Weird History Presents: Graveyard Shift, we take a look at the bizarre and horrifying story of how a TV antihero influenced a real-life killer, the shocking evidence investigators uncovered, and why the case became one of the most infamous examples of life imitating art.
Are you a fan of Dexter? Let us know in the comments.
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#dexter #truecrimestories #weirdhistory
@CheshireCatGrins
July 3, 2026 at 3:46 am
He thought that he was so smart that he could sway the jury, or that he was going to come up with these amazing lies just like on TV shows and movies, only to find out that he was actually the biggest idiot in the room.
@mcalla113
July 3, 2026 at 3:46 am
I actually sat down with the victim that got away and had beers with him all night. He told us the whole story in vivid detail. It was wild.
@alterlux5616
July 3, 2026 at 3:46 am
What have you done with the original guy?
Going to call the cops
@jjwallnutts
July 3, 2026 at 3:46 am
this channel is shifting to just trying to be creepy. I think it's going to start dropping viewers real quick.
@timothyivey5497
July 3, 2026 at 3:46 am
Not quite a Dexter copycat if he only copies Dexter's methods of killing and disposal. If he were a true copycat he would've killed other killers. He didn't.
@prncsshzl
July 3, 2026 at 3:46 am
1. I miss the 'OG' or even the person who followed after. This voice this doesn'y give Weird History.
2. This was boring. You know why? BECAUSE DEXTER CAN'T BE CAUGHT. This killer was easily caught?
3. How is this weird history?
@AstreaMaya
July 3, 2026 at 3:46 am
If u want to get away with murder: get rid of ALL evidence, and do your best not to leave any. …as was told to me by someone that got away with it.
Dont be stupid IF youre gonna be evil.
@bobbisparks53
July 3, 2026 at 3:46 am
I bet it pisses this creep off that Dexter actually had 2 spin off series that weren't too bad in all honesty. Granted, his crime took place in Canada so he'll definitely be back out someday but I can hope that when that happens, he still won't get to see them!
@auntvesuvi3872
July 3, 2026 at 3:46 am
Unfortunate… but interesting. 🩸
@CaedusRising
July 3, 2026 at 3:46 am
I don’t get it
They also dexter there hero
But dexter killed bad guys
These people also just killing innocents
@elizalam5253
July 3, 2026 at 3:46 am
What an IDIOT 👎🏻👎🏻👎🏻👎🏻👎🏻👎🏻👎🏻😩😩👎🏻👎🏻💩💩💩💩💩💩💩💩😡😡😡🤬🤬🤬
@katferris
July 3, 2026 at 3:46 am
Why would the show Dexter count as "history"? It began it's airing in October of 2006, less than 10 years ago. It's not as though it came out during television's silver screen hey-day or anything. This seems like cheap effort, sorry to say.
@Userfbdbdkxjds
July 3, 2026 at 3:46 am
“Spatter” its blood “spatter” not blood “Splatter”
@EverettvonNordeck-gf2cw
July 3, 2026 at 3:46 am
Is my narrator on vacation?
@Optivolt2026
July 3, 2026 at 3:46 am
3:17 a hoemicide you say?!
@yulurkinbrah
July 3, 2026 at 3:46 am
zesty voice
@kellychuang8373
July 3, 2026 at 3:46 am
That's something and really hard to even imagine on this scale.
@User-54631
July 3, 2026 at 3:46 am
What a lame. I watched natural born killers on LSD as a teen. Didn’t make me wanna go hurt people
@terryl7874
July 3, 2026 at 3:46 am
Wait a minute. Why give someone a sentence of life without parole for twenty five years. What are they going to do kill after twenty five years 😂😂😂
@brianraynor7545
July 3, 2026 at 3:46 am
Graveyard Shift has its own channel. Put these videos on it and leave this channel for the good videos.
@Mr1969gapper
July 3, 2026 at 3:46 am
I'm from Edmonton this was a huge deal here when it happened
@woodsgump
July 3, 2026 at 3:46 am
This guy’s voice sounded like Nix from the Danger Dolan cast (kinda)
@matthewdrummond9028
July 3, 2026 at 3:46 am
I would subscribe if this became it's own Weird History channel 🙂
@bummblebee77
July 3, 2026 at 3:46 am
Missing the old voice.
@whenfatkillsfat803
July 3, 2026 at 3:46 am
Dexter inspired Luigi and we should all be grateful for that.
@fornhunkle
July 3, 2026 at 3:46 am
I loathe that Edmonton is famous for this guy and Chris Benoit…
@phacelesshero
July 3, 2026 at 3:46 am
The title of this video kinda bugs me. Watch a lot of true crime vids. Fact is, Dexter inspired A LOT of murderers to follow through with their sick plans. This guy definitely tried the hardest to mimic the characters techniques though. I don't blame the book or show in any way for writing good fiction.
@DigitalDiamonds24
July 3, 2026 at 3:46 am
clicks while speaking
@clintcountryman4849
July 3, 2026 at 3:46 am
Who the hell is this?
@sagekay9121
July 3, 2026 at 3:46 am
Why so many people getting sociopath and psychopath mixed up? Psychopaths are the planners, sociopaths more spontaneous
@OnnikaJeffryes-m2m
July 3, 2026 at 3:46 am
People get so damn strange sometimes!!
@abdulalimharuna9964
July 3, 2026 at 3:46 am
Braaah
This is interesting
America is not a real place
@TheFeltmeister
July 3, 2026 at 3:46 am
Who dis voice
@MamaTs2026
July 3, 2026 at 3:46 am
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