Brenda Wright Lafferty, 24, and her 15-month-old daughter Erica were murdered in 1984,

As depicted in the film under the Banner of Heaven.

The tragic killings in Utah and their aftermath are the subject of FX's true-crime thriller,

Which stars Andrew Garfield as detective Jeb Pyre and Daisy Edgar-Jones as Wright Lafferty herself.

"Steve Harvey": Explained To Beat The Dating Games 

The first two episodes of the show, which aired on FX on Hulu on Thursday,

April 28, did not indicate who the villain was.

Everyone ask is it true that Under the Banner of Heaven is based on a real story?

'Under the Banner of Heaven,' a Hulu Original Series, Tells a True Murder Story.

Following the success of his HBO series Big Love,

Oscar-winning screenwriter Dustin Lance Black is now working on a far darker Mormon family narrative.