Gary Ridgway, otherwise known as the Green River Killer, is believed to be in end-of-life care as of this week.

Former German hospital nurse Niels Hoegel has claimed to have killed around 100 of his patients with drug overdoses, which would make him one of the world's most prolific serial killers in recent ...

Did you know some of the vilest, most sadistic, most warped killers in history got away? Most of them you won’t have even heard of. Check out today's insane new video that will give you nightmares as ...

Here is a recap of some of the others, starting with two more serial killers from Russia. Alexander Pichushkin was sentenced to life in prison in Moscow in 2007 for 48 murders, most between 2002 and ...