Oxygen’s Unknown Serial Killers of America returns for season two on August 2, 2026, with cases that take place in cities including Maryland, Miami, Phoenix, and Minneapolis-St. Paul. New episodes will air on Sundays at 10pm ET/PT.
“Unknown Serial Killers of America takes viewers across the nation to take a closer look at some of America’s most prolific, unfamiliar killers,” reads Oxygen’s synopsis. “This season, viewers will discover several of the utmost heinous killers that shocked communities across the nation with some of the most sinister slayings to this day.”
The true crime series is produced by Pantheon Media Group. Executive producers include Steve Michaels, Ariel Brozell, Steffanie Siebrand, Elvia Van Es Oliva, Brad Bernstein, David Karabinas, James Macnab, and Matthew Watts.
Unknown Serial Killers of America Season 2 Cases:
• When four women are found murdered across four states, police race to track down a charismatic drifter whose charm conceals a deadly rage toward women.
• After a mother is found murdered, investigators launch a manhunt for a long-haul trucker whose killing spree leaves a trail of victims.
• When police discover a string of deaths at an upscale retirement community, they uncover what could be one of the most prolific serial killers in American history.
• After bodies are dumped across Miami, a rising body count fuels a desperate hunt — until one woman’s escape exposes the predator.
• As bodies of gay men appear along I-95, each marked by the same chilling signature, the FBI tries to corner the predator before he strikes again.
• As Phoenix reels from a wave of violence, a rapist turned murderer and a random sniper plunge the city into fear—forcing detectives to hunt two deadly predators.
