Decades before Ed Gein was revealed to be a gruesome killer in Wisconsin in the late 1950s, he was a shy boy devoted to his stern mother. The isolated childhood of Gein is part of the story along with his shocking crimes in "Monster: The Ed Gein Story,

Murderer Ed Gein became a template for the modern-era serial killer in everything from Alfred Hitchcock's "Psycho" to "The Silence of the Lambs."

Also known as the Plainfield Ghoul, Gein lived in Wisconsin during the 1950s, and is confirmed to have killed two women. He was also a suspect in other unsolved cases. It later emerged he had also dug up bodies from the local cemetery.

In order to get the voice of serial killer Ed Gein just right for the third season of Netflix's Monster, Charlie Hunnam went down a dark rabbit hole that led him to a rare recording that even Netflix couldn't find.