Doomsday plot: Idaho jury convicts Chad Daybell of killing wife and girlfriend's 2 children

BOISE, Idaho — An Idaho man was convicted Thursday of killing his wife and his new girlfriend's two youngest kids in a strange triple murder case that included claims of apocalyptic prophesies, zombie children and illicit affairs.

Jurors deliberated just six hours before finding Chad Daybell guilty, capping a case that began in 2019 and spanned at least four states. Daybell, standing and wearing a long-sleeve dress shirt, was stoic as the verdicts were read.

Now jurors will be tasked with deciding if Daybell, 55, should die for the murders of Tammy Daybell, 16-year-old Tylee Ryan and 7-year-old Joshua ''JJ'' Vallow. The nearly two-month trial's penalty phase resumes Friday.

''Everything was addressed, every item was ‘guilty,' and for that, I'm happy," JJ's grandfather Larry Woodcock told The Associated Press. ''I'm still sad for the loss — there were four lives lost in this for no purpose, no reason — but my wife and I are just so satisfied with the verdict.''

The childrens' mother, Lori Vallow Daybell, was sentenced to life in prison without parole on the same conspiracy and murder charges last year. She married Chad Daybell just two weeks after Tammy Daybell was killed. She's now awaiting trial in Arizona, charged with murder in connection with the shooting death of her fourth husband, Charles Vallow. Charles Vallow was JJ's father.

The judge in the case has issued a gag order prohibiting attorneys on both sides from talking to the media until the trial is complete.

The case drew widespread media attention, and the judge moved the trial from the rural Idaho community where the killings occurred to Boise in an effort to ensure a fair and impartial jury.

The investigation began five years ago, after JJ's grandparents Kay and Larry Woodcock became concerned that Vallow Daybell was refusing to let them have phone calls with the boy. Though they lived in different states, JJ and his grandparents had always been close, sharing regular video calls since he was about three years old. JJ was very bright and also autistic, Larry Woodcock said, and whenever he ran out of things to say he'd tell them, ''Mawmaw, Pawpaw, I don't know.'''

''In the last couple of years of his life, he was developing his wit and his personality. If there's anything that I miss, it's his wit,'' Larry Woodcock said. ''There's not a day that goes by now that my wife and I don't turn to each other and say, ‘Mawmaw, I don't know,' or ‘Pawpaw, I don't know.'''

In 2019, Kay Woodcock asked police to check on the child. Investigators soon realized both children were missing, and a multistate search ensued. The investigation soon took several unexpected turns.

Vallow Daybell and Chad Daybell were having an affair when both of their spouses died unexpectedly, investigators said. Vallow Daybell's husband, Charles, was shot to death by her brother Alex Cox in Arizona in July 2019; the brother told police it was in self-defense. He was not charged.

Vallow Daybell, her kids JJ and Tylee, and Cox subsequently moved to eastern Idaho to be closer to Daybell, a self-published writer of doomsday-focused fiction loosely based on Mormon teachings.

Nearly a year after the children went missing, their remains were found buried on Chad Daybell's property in eastern Idaho. Investigators determined both children died in September 2019. Prosecutors say Cox conspired with Chad Daybell and Vallow Daybell in all three deaths, but Cox died of natural causes during the investigation and was never charged.

Prosecutors called dozens of witnesses to bolster their claims that Chad Daybell and Vallow Daybell conspired to kill the children and Tammy Daybell because they wanted to get rid of any obstacles to their relationship and 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.

Fremont County prosecutor Lindsay Blake said 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 during closing arguments on Wednesday.

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.

Daybell's defense attorney, John 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.

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, Cox, committed the crimes. He noted that Cox had killed JJ Vallow's father in Arizona and that the two children were the only witnesses to that shooting. He also said Cox tried to frame Daybell by burying the slain children in Daybell's yard.

During the sentencing phase, jurors will be asked to decide if Daybell should receive a death sentence — Idaho law allows execution by lethal injection or firing squad — or life in prison. Woodcock said he will be satisfied with either option.