Mark of a Killer

• S4 E4 - The D.C. Sniper

• S4 E3 - The Skull Crusher

• S4 E2 - The Bayou Strangler

All serial killers commit murder to satisfy their grand fantasies, but the murderers featured in this true-crime docuseries take it one step further, committing heinous acts that allow them to extend their fantasies and relive the excitement of their crimes again and again.

Currently you are able to watch "Mark of a Killer" streaming on fuboTV, Peacock Premium, DIRECTV, NBC, OXYGEN or buy it as download on Apple TV, Amazon Video, Vudu, Google Play Movies.