But there are several reasons to think that some serial killers have no genetic predisposition to kill intentionally but are created purely by their environment. One reason is that the heritability of ...

(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 ...

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 ...

The question "Are serial killers born or made?" inevitably comes up in almost any discussion of the most notorious and most barbaric serial killers in human history (that is, serial killers who not ...