Learn more about serial killer Terry Rasmussen, whose crimes are detailed in Oxygen's Unknown Serial Killers of America.

New York City police say writings by Luigi Mangione, the suspect in the murder of UnitedHealthcare CEO Brian Thompson, show the alleged killer has "ill will toward corporate America." Experts say ...

Amid internet speculation about a serial killer in New England, one New Hampshire woman who survived a suspected serial killer herself in the 1980s is encouraging locals to remain “vigilant.” ...

Amid internet speculation about a serial killer in New England, one New Hampshire woman who survived a suspected serial killer herself in the 1980s is encouraging locals to remain "vigilant." ...

Police in New England have so far insisted there is nothing to worry about despite the growing fears on social media.

Longtime residents may remember the "Connecticut River Valley Killer," who is believed to have killed several women in New Hampshire. H. H. Holmes, who is widely considered the nation's first ...