Be careful.

Add Yahoo as a preferred source to see more of our stories on Google. A new study reveals the state of Montana has the highest number of serial killers per capita ...

Here's a select list of convicted American serial killers and notable open or unsolved cases. Serial murder is defined by the FBI as two or more killings separated by a span of time. A majority of ...

DOTHAN, Ala. (WTVY) - Serial killers are known and remembered for the horrific crimes they commit, no matter how long ago the crimes occurred. True crime, investigative documentaries, and horror films ...