7 Serial Killers Who Used the Internet to Find Victims
The internet promised to bring the world closer together, but for some of the most depraved minds, it became the perfect hunting ground. What began as innocent chats, dating profiles, and classified ads turned into traps for unsuspecting victims. These predators exploited the trust people place in online interactions, using platforms to groom, lure, and ultimately destroy lives.
From the dawn of the web in the 1990s to today’s app-driven world, serial killers have adapted to digital tools with chilling efficiency. This list examines seven such cases, analyzing how they weaponized the internet, the tragedies that ensued, and the lessons for online safety. Each story underscores a painful truth: behind every screen name is a human life at risk.
These accounts are drawn from court records, investigations, and victim testimonies, approached with respect for those lost and their families. The goal is not sensationalism, but awareness.
1. John Edward Robinson: The Internet’s First Serial Killer
Background
Born in 1943 in Chicago, John Edward Robinson presented himself as a successful businessman and family man. By the 1980s, he had a wife, four children, and a facade of respectability. Beneath it, he harbored sadistic fantasies, graduating from fraud to murder. Robinson was tech-savvy for his era, embracing early internet bulletin boards and chat rooms in the mid-1990s.
Weaponizing the Web
Robinson created websites promoting BDSM lifestyles under aliases like “Slavemaster.” He posed as a recruiter, offering women jobs in Kansas City or promising adventure in S&M scenes. Victims responded to his ads on Prodigy chat rooms and his personal site, believing they had found opportunity or excitement. This digital outreach allowed him to cast a wide net across states, far beyond local bars or streets.
The Crimes
At least eight women fell victim between 1997 and 1999. Suzette Troutt, Izabela Lewicka, and others traveled to meet him, only to be drugged, tortured, and killed. Robinson stored their bodies in chemical drums, shipping some to storage units. His online trail—emails and chat logs—later proved damning. One victim, Lisa Stasi, vanished in 1984 pre-internet, but digital evidence tied him to later murders.
Capture and Legacy
A tip from a survivor who escaped his grasp led to his 2000 arrest. Raids uncovered the barrels. Convicted of capital murder in 2003, Robinson remains on death row in Kansas, his case highlighting early cyber forensics. Analysts note how his sites normalized danger, preying on vulnerability.
2. Philip Markoff: The Craigslist Killer
Background
Philip Markoff, a 23-year-old Boston University medical student in 2009, seemed destined for success. Engaged to be married, he lived a double life fueled by addiction to online escorts. The recession-era Craigslist “erotic services” section became his gateway.
Weaponizing the Web
Markoff responded to ads from masseuses and escorts, arranging meetings under pseudonyms. The platform’s anonymity let him browse anonymously, contact via email, and set traps without scrutiny. He targeted women advertising “sensual massages,” exploiting economic desperation.
The Crimes
On April 14, 2009, he shot Julissa Brisman, a 25-year-old aspiring model, in a hotel. Days earlier, he robbed and bound Trisha LePors. A third victim, Ayn Jalil, escaped. Ballistics and IP traces linked the attacks. Brisman’s death shocked the nation, her final texts pleading for help.
Capture and Legacy
Police tracked his emails and hotel cameras. Arrested days later, Markoff denied involvement but hanged himself in 2010 before trial. The case prompted Craigslist to shutter its adult section, proving how classified sites could amplify risks for gig workers.
3. Mark Twitchell: The Dexter Killer
Background
Canadian filmmaker Mark Twitchell, born in 1981, obsessed over the TV show Dexter. Struggling creatively, he turned fantasy into reality in 2008, using dating sites to enact his “kill room” script.
Weaponizing the Web
On Plenty of Fish, Twitchell posed as a woman named “Jen.” He lured men by switching identities mid-chat, inviting them to a fake movie shoot in a Edmonton garage rigged as a trap. The site’s casual hookup vibe masked his intent.
The Crimes
John Brian Altinger arrived October 19, 2008, and vanished. Twitchell stabbed him, dismembered the body, and incinerated remains. He attacked another, Justin Mahfr, who escaped wounded. Twitchell’s real-time blog and hard drive confessed the acts.
Capture and Legacy
Mahfr’s survival and a flash drive left in a storm drain led to Twitchell’s 2011 life sentence for first-degree murder. His case exposed dating app catfishing dangers, inspiring documentaries on digital deception.
4. Stephen Port: The Grindr Killer
Background
British warehouse worker Stephen Port, 41 at arrest in 2016, lived quietly in Barking, East London. Gay and unremarkable, he hid psychopathy behind a bland profile.
Weaponizing the Web
Port used Grindr, a gay hookup app, to message men. He offered party drugs, leading them home. Post-kill, he posed as a witness on the app, deflecting suspicion by claiming overdose discoveries.
The Crimes
Between 2014-2016, he killed four: Anthony Walgate, 23; Gabriel Kovari, 22; Daniel Whitworth, 21; Jack Taylor, 21. Each injected with fatal GHB, raped, and dumped near Port’s flat. Autopsies initially misread as suicides.
Capture and Legacy
Phone data and CCTV cracked the ruse; convicted in 2018 of murder and rape, he got whole-life. The inquiry criticized police failures, spurring app safety reforms like user verification.
5. Bruce McArthur: The Toronto Landscaper
Background
Bruce McArthur, born 1951, retired Toronto mall Santa and landscaper, projected grandfatherly charm. Divorced, he reentered the gay scene post-50.
Weaponizing the Web
McArthur scoured apps like SilverDaddies, DaddyHunt, and Squirt.org, targeting older, immigrant men from Middle East/South Asia. Profiles promised companionship; chats built false trust.
The Crimes
From 2010-2017, he murdered eight: Skandaraj Navaratnam, Andrew Kinsman, and others. Victims strangled, dismembered; remains in planters at properties he gardened. Sexual trophies marked his rituals.
Capture and Legacy
Missing persons probes led to a survivor’s tip and property searches in 2018. Life sentence followed guilty pleas. It exposed vulnerabilities in marginalized communities, prompting better missing persons protocols.
6. William Melchert-Dinkel: The Suicide Predator
Background
Minnesota nurse William Melchert-Dinkel, 50s at 2011 trial, specialized in mental health. Twistedly, he sought thrill in despair.
Weaponizing the Web
On forums like alt.suicide.holiday and Webringer, he posed as “Cami,” a suicidal 18-year-old, or “Faust,” offering nooses. He groomed vulnerable teens via Yahoo and Facebook chats.
The Crimes
Nadia Kajouji, 18, drowned after his encouragement in 2008. Mark Drybrough, 32, hanged himself per instructions in 2005. He attempted a third. Chats detailed his arousal at their deaths.
Capture and Legacy
Nadia’s body recovery and chat logs led to charges. Convicted of assisting suicides, he served 180 days initially, paroled then re-incarcerated. His case spotlighted online suicide chat dangers.
7. Shawn Grate: The Facebook Stalker
Background
Ohio drifter Shawn Grate, 40 at 2016 arrest, nomadic and abusive, escalated from assaults to serial murder in Ashland.
Weaponizing the Web
Grate used Facebook friend requests and Craigslist to contact women, posing as needy or romantic. He messaged Stacy Stanley, luring her under pretense.
The Crimes
Confirmed five victims: Stanley (2016), strangled after FB meet; Candice Baker, Dana Roy, Elizabeth Griffith, and earlier. Bodies in an abandoned house. He confessed fantasies.
Capture and Legacy
A 911 call from survivor Angela Brock hid in attic led police to him. Death sentences in 2019. Highlights social media’s role in targeting isolates.
Conclusion
These seven killers—spanning decades and platforms—demonstrate the internet’s dark evolution as a predator’s tool. From Robinson’s pioneering sites to Grate’s casual FB pokes, each exploited human connection’s fragility. Victims like Julissa Brisman and Anthony Walgate remind us of lives cut short by misplaced trust.
Yet awareness grows: apps now feature safety checks, police use digital forensics, and communities educate. Verify identities, meet publicly, share plans. Vigilance turns the web from hunting ground to safer space. These tragedies demand we honor the fallen by protecting the living.
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