Based on real-life events and taped confessions,The Chris Watts Story, a working title, will chronicle the months that led up to the horrific crime, piecing together the Colorado dad’s possible motives.

Sean Kleier (Odd Mom Out) has been cast as Chris,Ashley Williams(How I Met Your Mother), as Shanann and Brooke Smith (Bates Motel, Ray Donovan) as FBI agent Tammy Lee. Sony Pictures Television is producing the film for Lifetime.

From left: Ashley Williams; Sean Kleier; Brooke Smith.Paul Archuleta/FilmMagic; Mike Pont/Getty; Amanda Edwards/WireImage

SEAN KLEIER,-ASHLEY WILLIAMS,-BROOKE SMITH

On Aug. 13, 2018, Chris killed his15-weeks-pregnant wife and their two young daughters. He first strangled Shanann, then, with her body in the back of his truck, he drove to a remote oil work site with his sleeping daughters —Bella, 4, and Celeste, 3— in the backseat.

Before burying Shanann in a shallow grave, Watts said he smothered Celeste in the backseat, right next to Bella. After dumping Celeste’s body in an oil tank, he returned to smother Bella, who begged for her life. He then stashed her body in another oil tank.

Chris Watts.RJ Sangosti/The Denver Post/Getty Images

Watts sentenced to life

The Watts family.Facebook

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At the time of the murders, Watts was having an affair with a co-worker,Nichol Kessinger. Kessinger cooperated with police and said she thought Watts was separated while they were dating.

But authoritiesdidn’t buy his shocking explanation. As the case headed for trial, Chris, now 34,pleaded guilty to all three killings. He is currently serving five life sentences without the possibility of parole.

The Chris Watts Storyis set to premiere in 2020. The network will air a PSA to stop violence again women following the movie, providing resources and information.

source: people.com