Serial killers commit heinous acts that are unimaginable to the average human being. Identifying the motive behind acts of violence such as murder is something doctors have researched for decades.

More than 5,000 serial killers have been documented throughout human history, spanning a wide range of motives, behaviors and backgrounds. By studying these cases, we can gain insight into the complex ...

For decades, criminologists and true crime documentaries have attempted to understand what causes serial killers to commit the atrocities they do. Dennis Rader, John Wayne Gacy, Jeffrey Dahmer, Albert ...

(CNN) -- For decades, criminologists and true crime documentaries have attempted to understand what causes serial killers to commit the atrocities they do. Dennis Rader, John Wayne Gacy, Jeffrey ...

It seems obvious that anyone who willfully and repeatedly commits murder is a psychopath: remorseless, egotistical, manipulative, and cruel. Think of Ted Bundy, Dennis Rader, or John Wayne Gacy.

Ask anyone to name a serial killer and chances are that they will come up with a short list — of all male serial killers. But that's not to say that women have never been serial killers. At least 8% ...