Unknown Serial Killers of America Season 1, Episode 4: Terry Rasmussen

Carl Watts

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.

43 min

William Suff

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.

43 min

Daniel Conahan

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.

Maury Travis

From 2001 the bodies of 12 black women start to surface in Missouri and Illinois. As the investigation intensifies the killer start to taunts authorities.

Herb Baumeister

A group of young gay men disappear in Indiana during the 1990s. An amateur detective uncovers clues that leads to identify a merciless offender.