Marjorie Diehl-Armstrong

Born: 1949-02-26

Marjorie Diehl-Armstrong (February 26, 1949 – April 4, 2017) had a history of suffering from multiple mental illnesses including bipolar disorder, since her early teens, and seems to have been a serial killer. Before her mental health deteriorated in her twenties, Diehl-Armstrong was an "exemplary student" in high school and earned a master's degree from Gannon College. In 1984, she shot her boyfriend Robert Thomas six times as he lay on the couch but was acquitted on claims of self-defense. Her husband and several other partners also died under suspicious circumstances. Diehl-Armstrong died from breast cancer in prison on April 4, 2017, at the age of 68.


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Evil Genius

as Self (archive footage)
First aired: 2018-05-11

This baffling true crime story starts with the grisly death of a pizza man who robs a bank with...

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