I Killed Him. Boom. Boom. Signs of a Psychopath : Season 3 Episode 4

Investigation Discovery 30m int(0)

Aired: October 5th, 2021 @ 10:00 PM EST on Investigation Discovery

Police respond to a 911 call to find a father of two dead in his home with more than 15 gunshot wounds. Police question the family, but one person is missing, his mother-in-law. Now detectives must determine if this grandma could be a deadly psychopath.