Content Warning: The following article contains discussions of graphic violence, sexual assault, rape, and suicide.Serial killers have fascinated society for decades. What causes someone to cross that ...

Add Yahoo as a preferred source to see more of our stories on Google. The main investigator for one of America's most chilling unsolved serial killer cases believes he has identified the perpetrator ...

Long Island serial killer Rex A. Heuermann maintained a four-day killing ritual, building trust with his victims before ending their lives in a basement "kill room" and dumping their remains near ...

Police have linked the unidentified serial killer to six victims, though they believe the number could be as high as 16.