BOISE, Idaho — Jury deliberations began Wednesday in the case of an Idaho man charged with murdering his wife and his girlfriend’s two youngest children in what prosecutors said was a callous scheme for money, power and sex.

“Three dead bodies … and for what?” prosecutor Lindsey Blake told jurors in the trial of Chad Daybell. “Money, power and sex — that’s what the defendant cared about.”

Daybell, 55, is charged with three counts of first-degree murder, insurance fraud, conspiracy to commit murder and grand theft in connection with the 2019 deaths of Tammy Daybell, 7-year-old Joshua “JJ” Vallow and 16-year-old Tylee Ryan. Prosecutors have said they will seek the death penalty if Daybell is convicted.

But Daybell’s defense attorney, John Prior, told jurors that there wasn’t enough evidence to tie Daybell to the deaths. Prior said police looked only for things they could use against Daybell rather than the actual facts of the case — and he claimed that the children’s late uncle, Alex Cox, committed the crimes.

Last year, the children’s mother and Daybell’s girlfriend, Lori Vallow Daybell, received a life sentence without parole for the killings.

Prosecutors have called dozens of witnesses to bolster their claims that Chad Daybell and Lori Vallow Daybell conspired to kill the two children and Tammy Daybell because they wanted to get rid of any obstacles to their relationship and to obtain money from survivor benefits and life insurance. Prosecutors say the couple justified the killings by creating an apocalyptic belief system that people could be possessed by evil spirits and turned into “zombies,” and that the only way to save a possessed person’s soul was for the possessed body to die.

Blake said Wednesday that Daybell styled himself a leader of what he called “The Church of the Firstborn” and told Vallow Daybell and others that he could determine if someone had become a “zombie.” Daybell also claimed to be able to determine how close a person was to death by reading what he called their “death percentage,” Blake said.

With these elements, Daybell followed a pattern for each of those who were killed, Blake said.

“They would be labeled as ‘dark’ by Chad Daybell. Their ‘death percentage’ would drop. Then they would have to die,” she said.

Prior rejected the prosecution’s descriptions of Daybell’s beliefs. He described Daybell as a traditional member of the Church of Jesus Christ of Latter-day Saints, a deeply religious man who talked about his spiritual beliefs every chance he could get.

Chad Daybell and Vallow Daybell married just two weeks after Tammy Daybell’s death in October 2019, raising suspicion among law enforcement officials. Tammy Daybell’s body was later exhumed, and officials say an autopsy showed she died of asphyxiation. Chad Daybell had told officials that Tammy Daybell had been sick, and that she died in her sleep.

Witnesses for both sides agreed that Chad Daybell and Vallow Daybell were having an affair that began well before Tammy Daybell died, and that the two young children were missing for months before their remains were found buried in Chad Daybell’s backyard.