Unknown Serial Killers of America

Chilling confessions from a vicious slasher detail only some of his 100+ victims.

In the '90s, a deranged killer stalks sex workers in Riverside, Calif., claiming the lives of 13 women.

Multiple unidentified bodies are found inside barrels in a New Hampshire forest.

When the bodies of 12 Black women surface in Missouri and Illinois, the serial killer taunts authorities by sending a cryptic letter.

When droves of young gay men disappear in Indiana in the '90s, an amateur sleuth uncovers clues that point to a likely killer.