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Charlie Hunnam tells PEOPLE how he embodied Ed Gein in the new season of Netflix's Monster

He explains that he tried to understand the murderer better by learning about his trauma and changing his own physical appearance

Monster: The Ed Gein Story is available to stream on Netflix

It was no small feat for Charlie Hunnam to transform into a serial killer for the new season of Monster .

In the third iteration of the hit Netflix series, the actor, 45, plays infamous murderer Ed Gein — who went on a killing spree in the 1950s and robbed graves to use human remains to craft household items and clothing.

During a conversation with PEOPLE at the New York City premiere, Hunnam shares how he prepared for the intense role.

“I mean, finding the truth was the whole process,

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