BOISE, Idaho (NEWSnet/AP) — The trial of a man charged with the deaths of his wife and his girlfriend's two youngest children is set to begin this week in Idaho.

Chad Daybell, 55, is charged with three counts of first-degree murder for the deaths of Tammy Daybell, 7-year-old Joshua "JJ" Vallow and JJ's elder sister, Tylee Ryan, who was seen last a few days before her 17th birthday.

The trial is expected to continue for up to 10 weeks, with jury selection getting underway Monday in Boise.

The younger children’s mother, Lori Vallow Daybell, who married Chad Daybell shortly after the deaths, was found guilty in 2023 and sentenced to life in prison without parole.

The couple claimed they could tell if people are possessed by dark spirits that could turn them into “zombies,” former friend Melanie Gibb testified in court. They believed the only way to get rid of a zombie was to destroy the possessed person’s body by killing them.

The children’s bodies were found buried in Chad Daybell’s eastern Idaho yard in summer 2020.

Chad Daybell also is charged with insurance fraud in connection with Tammy Daybell's death and two counts of conspiracy to commit first-degree murder and grand theft by deception.

If convicted, he could face the death penalty.

Daybell has pleaded not guilty. Last week, his attorney John Prior told KIVI-TV in Boise that Daybell is ready to go forward with the case and “wants to tell his story.”

Two days later, 7th District Judge Steven Boyce issued a gag order barring any attorneys or parties in the case from discussing it until after jury selection and opening statements.

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