Monster: The Ed Gein Story leaves viewers wondering more about one of the titular serial killer's family members: his father, George Philip Gein.

The Ed Gein Story' plays fast and loose with the real-life details of the killer's gruesome exploits. Here's what's fact and what's fiction on the true crime series.

Played by Vicky Krieps, Ilse Koch is first introduced to Gein when his girlfriend Adeline Watkins brings him a box of dark concentration camp items as a present. In the box is a comic book about the “Bitch of Buchenwald,” otherwise known as Ilse Koch.

The Ed Gein Story" focuses on the serial killer and grave robber who inspired some of Hollywood’s darkest films. Here’s who Ed Gein was and what he did.

Monster: The Ed Gein Story' explores the notorious killer and grave robber Ed Gein's cultural impact over the last several decades. Here's the real story of how Gein was caught — and how he died.

Infamous murderer Ed Gein helps investigators track down serial killer Ted Bundy in the latest season finale of the Netflix series. But is it true?

Gein was arrested in 1957 after he was suspected of killing Bernice Worden, a local hardware store owner. When authorities went to Gein's home to question him, no one answered the door, but investigators saw the body of a woman hanging by the heels, according to the Associated Press.

The Ed Gein Story, is, many viewers have been unsure as to what is—and isn't—true to life in the drama starring Charlie Hunnam. Detailing the disturbing grave robbing and murderous crimes of seemingly quiet handyman,

Charlie Hunnam is sharing what went through his head when he agreed to play serial killer Ed Gein — and how he "fell into a full panic" after realizing the decision he made.

Among the many creative liberties taken by the hit Netflix show "Monster: The Ed Gein Story" is a final episode arc in which killer Richard "Birdman" Speck professes to idolize Gein and even corresponds via letter with the confined Wisconsin murderer.

Now that more reviews have come in, the Rotten Tomatoes score of Ed Gein has sunk more than 20%, and now stands at just a 23% critic score. That’s below the previous two Monster entries, and also Netflix’s True Crime serial killer series, Conversations with a Killer. Here’s how the list breaks down: