It’s a question that confounds criminologists. Where have all the serial killers gone? Serial murder may not be a strictly ...

(WTAJ) — You may recognize names like Jeffrey Dahmer, The Zodiac Killer and Son of Sam –serial killers from the ’60s, ’70s, and ’80s — but do you know about the killers with Pennsylvania ties?

Ever wonder if there are as many serial killers lurking in the shadows as there used to be? Well, tried-and-true crime followers have, which is why Oxygen.com wanted to get to the bottom of the truth ...