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People Magazine Investigates

True

Retired drama teacher Kathy Gillcrist discovers that the police want her father for one of the most infamous mass murders in Maryland state history.

Sunday, 30 August 4 airings
13:00
Investigation Discovery
S8 E10 · My Father Was a Mass Murderer
14:00
Investigation Discovery
S8 E3 · The Boogeyman
15:00
Investigation Discovery
S8 E8 · Teenage Assassins
16:00
Investigation Discovery
S8 E4 · The Serial Killer's Playbook