What does the home of a cold-blooded killer look like? We take a closer look at some infamous houses where blood has been shed.

Was bullying during his early years to blame for Joel Rifkin becoming one of the most prolific serial killers in New York history?

Some of the most notorious serial killers of our time have something in common, beside their thirst for blood: They were all adopted. A&E True Crime talks to criminologist Dr. Scott Bonn to see whether there is any evidence of an adoptee-serial killer connection.