Criminal (2014)

The Manual (5x5)

Air date: Feb 23, 2018

In 1993, Mildred and Trevor Horn, along with their live-in nurse Janice, were found murdered in their Montgomery County home. A Maryland police spokesperson described the homicide investigation as the most "exhaustive and labor intensive" in the department's history. And then homicide investigators found a strange manual titled Hit Man: A Technical Manual for Independent Contractors published by Paladin Press, and the case became national news.