The quiet suburban streets of Edmonton, Alberta, have become the backdrop for a chilling tale of deception, violence, and a failed attempt at becoming a serial killer, as the case of Mark Twitchell unfolds with horrifying new details. Twitchell, a 29-year-old aspiring filmmaker, was charged with first-degree murder on October 31, 2008, in connection with the death of 38-year-old Johnny Altinger, a man who was lured to his death through a 𝒻𝒶𝓀𝑒 online dating profile. The case has sent shockwaves through the community, exposing a dark underbelly of premeditated violence that police say was meticulously planned and executed with a disturbing lack of remorse.
The investigation began when Altinger vanished on October 10, 2008, after telling friends he was going to meet a woman named Jen, whom he had connected with on the dating website Plenty of Fish. Altinger’s friends grew suspicious when they received an out-of-character email claiming he had moved to Costa Rica, a story that quickly unraveled when they discovered his passport and clothes still in his apartment. This prompted a police inquiry that led them to Twitchell, who was renting a garage in southeast Edmonton, the very location where Altinger was last seen.
The garage, which Twitchell had been using as a film set for a horror movie titled “House of Cards,” became the epicenter of a gruesome crime scene.
Court documents and police evidence reveal that Twitchell had been meticulously planning his attacks for months. He created a 𝒻𝒶𝓀𝑒 female profile on Plenty of Fish, using stolen photos to lure men to his garage, where he had set up what he called a “𝓀𝒾𝓁𝓁 room.” The room was outfitted with plastic sheeting, a green curtain for hiding, and an array of weapons, including metal pipes, stun guns, and prop guns from his film projects.
Twitchell’s first attempt at murder occurred on October 3, 2008, when he targeted 33-year-old Gilles Tetreault, a recently divorced man who had been chatting with the 𝒻𝒶𝓀𝑒 profile. Tetreault was attacked with a stun gun and threatened with a 𝒻𝒶𝓀𝑒 gun, but he managed to escape by crawling under the garage door and fleeing to safety.
The failed attack did not deter Twitchell. Instead, he refined his methods, writing a detailed 42-page document titled “SKConfessions,” which police later recovered from his computer. In the document, Twitchell described his progression into becoming a serial killer, detailing his lack of empathy and his desire to 𝓀𝒾𝓁𝓁.
He wrote about the attack on Tetreault, noting what he had done wrong, and then outlined his plan for Altinger. On October 10, 2008, Twitchell lured Altinger to the garage under the pretense of meeting Jen. After three failed attempts to get Altinger to enter the garage, Twitchell finally struck him with a metal pipe, stabbed him in the gut and throat, and watched him bleed to death.
The aftermath of the murder was equally chilling. Twitchell used what he called a “game processing kit” to dismember Altinger’s body, using tools like a butcher knife and a fillet knife. He then attempted to dispose of the remains, using pure ammonia to clean the garage and destroy DNA evidence.
He also took Altinger’s car, a red Mazda 3, and concocted a flimsy story about buying it for $40 from a man who claimed to be moving to Costa Rica. Police were immediately suspicious of this story, especially after they found Altinger’s car in Twitchell’s possession.
The investigation took a critical turn when police searched Twitchell’s home in St. Albert. They found a hockey mask, a steel barrel, blood stains in the trunk of his car, a stun gun, and a post-it note with reminders like “𝓀𝒾𝓁𝓁 room clean sweep” and “Ship ebay items.”
Most damning of all, they discovered the “SKConfessions” file and a second document titled “Profile of a Psychopath,” in which Twitchell analyzed his own psychopathic traits. In the file, he wrote, “This is not a clinical diagnosis… This is a way for me to get out on virtual paper exactly what I think I am so I can evaluate it and understand it best.”
He listed characteristics he believed he had, such as habitual lying, and described how he manipulated his wife and therapist during couples counseling.
Twitchell’s arrest came after a series of police interrogations that were captured on video and have since become a key part of the public record. In the first interrogation, Twitchell was confident and talkative, discussing his film projects and his alibi at length. But when Detective Bill Clark confronted him with evidence that contradicted his story, Twitchell’s demeanor shifted dramatically.
He became silent and evasive, offering only short, ominous responses. The interrogation footage shows Twitchell slowly realizing that his web of lies was unraveling, and he eventually stopped defending himself altogether.
The case has drawn comparisons to the fictional serial killer Dexter, a character from the TV show that Twitchell was known to be obsessed with. Friends and acquaintances have noted that Twitchell seemed to idolize the character, who is a forensic blood spatter analyst by day and a vigilante killer by night. Twitchell’s own film projects, including the horror short “House of Cards,” which featured a serial killer luring victims from the internet, eerily mirrored his real-life crimes.
In a bizarre twist, Twitchell had even given his neighbors letters warning them that any screams they heard from the garage were part of a movie shoot.
The trial of Mark Twitchell began in 2011, and the prosecution presented a mountain of evidence, including the “SKConfessions” file, the interrogation videos, and forensic evidence linking Twitchell to Altinger’s murder. The defense argued that Twitchell was not a cold-blooded killer but rather a man with a troubled mind who had become obsessed with the idea of being a serial killer. They pointed to his failed first attack as evidence that he was not a competent murderer.
However, the jury was not convinced, and on March 23, 2011, Twitchell was found guilty of first-degree murder. He was sentenced to life in prison with no chance of parole for 25 years.
The case has left a lasting impact on the Edmonton community and beyond. It has raised questions about the dangers of online dating and the ease with which predators can use 𝒻𝒶𝓀𝑒 profiles to target victims. Police have praised the quick work of Altinger’s friends, whose suspicions led to the investigation, and have urged the public to be cautious when meeting people online.
The case also highlights the importance of forensic evidence and police interrogation techniques in solving complex crimes.
In the years since his conviction, Twitchell has been incarcerated at the Saskatchewan Penitentiary, where he continues to serve his life sentence. He has shown no remorse for his crimes, and his writings and interviews have revealed a man who is still fascinated by the idea of being a serial killer. In one interview, he described his actions as “a learning experience” and expressed regret only that he was caught before he could 𝓀𝒾𝓁𝓁 more people.
This chilling lack of empathy has made Twitchell a subject of study for psychologists and criminologists, who see him as a textbook example of a psychopath.
The story of Mark Twitchell is a cautionary tale about the dangers of unchecked ambition and the dark side of human nature. It is a reminder that evil can lurk in the most unexpected places, even in the guise of a friendly neighbor or a struggling filmmaker. For the families of Johnny Altinger and Gilles Tetreault, the pain of what happened will never fully heal.
But the swift justice that followed has provided some measure of closure, knowing that a dangerous predator has been removed from society.
As the case fades from the headlines, it leaves behind a legacy of fear and fascination. The interrogation videos, the written confessions, and the gruesome details of the crimes have been dissected by true crime enthusiasts and experts alike. Twitchell’s story has been featured in documentaries, podcasts, and books, cementing his place in the annals of criminal history.
But for those who lived through the events, the memory of that October night in 2008 will never be forgotten.
The Edmonton Police Service has used this case as a training tool for officers, highlighting the importance of thorough investigations and the use of technology in solving crimes. They have also worked to improve public awareness about the risks of online dating, encouraging people to verify identities and meet in public places. The case has also sparked discussions about the portrayal of violence in media and its potential influence on vulnerable individuals.
In the end, Mark Twitchell’s story is one of failure and hubris. He wanted to be a serial killer, but he was caught after just one murder, thanks to the vigilance of his victim’s friends and the skill of the police. His attempts to cover up his crimes were amateurish, and his confessions were a testament to his own arrogance.
He believed he was smarter than everyone else, but in the end, he was outsmarted by the very system he sought to defy.
The failed serial killer, Mark Twitchell, will spend the rest of his life behind bars, a reminder that even the most carefully laid plans can unravel in the face of justice. His story serves as a warning to those who would follow in his footsteps, and a testament to the resilience of a community that refused to let a killer go unnoticed. As the sun sets on this dark chapter, the people of Edmonton can take solace in the fact that justice has been served, and that the streets are a little safer because of it.
