Unknown Serial Killers of America

Unknown Serial Killers of America

Oxygen True Crime Running Crime

1 Season · 6 Episodes · Premiered May 18, 2025

Each year the FBI estimates between 25 to 50 active serial killers hunt their prey in America, taking the lives of hundreds of innocent people annually. Often these killings keep a city on edge, a heavy fear permeating the night air before these predators are taken off our streets. Just ask those who lived through the terror of The Night Stalker, Son of Sam or The Grim Sleeper. And years later the public still can't seem to get enough of their stories which continue to be retold in documentaries and limited series. Yet for every Jeffrey Dahmer or Ted Bundy who became part of the zeitgeist and remains with us like a dark specter, there are hundreds of other unknown serial killers whose horrific actions were just as terrifying, if not worse. This new series will profile these unknown serial killers who operated in silence. Their murders haunted law enforcement, who were unable to connect all their sick dots, as more innocent lives were lost until the killers were eventually caught. 

Where to Watch: Oxygen True Crime

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Seasons & Episodes

Season 1

6 episodes
E01
Carl Watts
Sun, May 18 2025 11:00 PM GMT+0000 60 min
Chilling confessions from a vicious slasher detail only some of his 100+ victims. When he's set to be the first serial killer ever released from prison, an eyewitness from decades prior could force justice on the man who vows to kill again.
E02
William Suff
Sun, May 25 2025 11:00 PM GMT+0000 60 min
In the '90s, a deranged killer stalks sex workers in Riverside, Calif., claiming the lives of 13 women. When a would-be victim describes the perp to police, the race is on to catch the murderous john before he strikes again.
E03
Daniel Conahan
Sun, Jun 1 2025 11:00 PM GMT+0000 60 min
Five corpses are found on the Florida hog trails. The investigation stalls until two men narrowly escape the perp's clutches. Years later, eight more bodies are found in nearby woods, leaving police to wonder if it's the same evil killer.
E04
Terry Rasmussen
Sun, Jun 8 2025 11:00 PM GMT+0000 60 min
E05
Maury Travis
Sun, Jun 15 2025 11:00 PM GMT+0000 60 min
E06
Herb Baumeister
Sun, Jun 22 2025 11:00 PM GMT+0000 60 min

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