Lori Vallow and her husband Chad Daybell were both charged with the murders of the former's two younger children and the latter's ex-wife.
Police believe it was the couple's radical religious beliefs that led them to commit the homicides of JJ Vallow, Tylee Ryan, and Tammy Daybell.
What is Chad Daybell's religion?
Lori Vallow and Chad Daybell have been dubbed the "Doomsday Mom and Dad" for their cult-like beliefs centered around the end of the world.
Both Vallow and Daybell are Mormons who belonged to the Church of Jesus Christ of Latter-day Saints.
The two were members of Preparing A People, which local Idaho residents have described as a cult because of their extreme doomsday ideologies.
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However, Preparing A People have since disputed any involvement with Vallow or Daybell.
A member of the religious group that follows Vallow and Daybell spoke to CBS 5 Investigates, claiming the couple communicates with spirits and they are true Mormons.
The unidentified woman said they stockpiled food and supplies because the world would come to an end.
Another woman who spoke to the Eastidahonews described the cult as an "extremist group" as a "better term."
“I think ‘cult’ is such a weird word because it doesn’t accurately describe what’s happening,” a woman the outlet called Jessica said.
The woman's experience with these groups started when she and her husband moved to eastern Idaho in 2015.
What did 'Preparing A People' say about Vallow and Daybell?
According to the website, Preparing A People's mission is to "prepare the people of this earth for the Second Coming of Jesus Christ."
Following the chain of mysterious events, Vallow and Daybell have left in their wake, the organization associated with Preparing a People called Color My Media has attempted to distance themselves from the mysterious couple.
The website clarified they are a multimedia company that put on Preparing a People which they define as a "series of lecture events focusing on self-reliance and personal preparation."
"It is not a 'group' and is not a 'cult' or something people join, but has educational lecture events that can be attended or watched on video," a statement on the Preparing a People Facebook read.
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"If you're here for Chad, well we don't know Chad. We don't have any of Chad's books, we never took money from Chad, maybe he drove by some 'Preparing A People' events but if he did he never got out of his car or even slowed down much."
Preparing a People did not immediately respond to The US Sun's requests for comment.
When were Chad Daybell and Lori Vallow indicted?
On May 25, 2021, Vallow and Daybell were indicted on first-degree murder charges in the children's deaths.
Daybell was also indicted of first-degree murder in the death of his then-wife Tammy Daybell.
Her death was originally thought to be from natural causes but investigators reopened the case and her body was later exhumed in December of 2019.
"Local, state, and federal law enforcement professionals and local and state prosecutors have worked tirelessly for nearly a year and a half to gather the facts and evidence necessary to bring forward charges on behalf of Tylee, JJ, and Tammy," Fremont County Prosecutor Lindsey Blake said in a statement.
"Due to the ongoing safety restrictions imposed by the courts during the pandemic, we just recently were given permission to present information to the Grand Jury for their review.
"They deliberated and determined there is probable cause to believe that the Daybells willfully and knowingly conspired to commit several crimes that led to the death of three innocent people."
In September 2019, Vallow's two children Tylee Ryan and JJ Vallow vanished without a trace.
A police investigation was launched, and Vallow fled to Hawaii with Daybell once cops started pressing her on Tylee and JJ's whereabouts.
Throughout the probe, Vallow maintained that her children were safe and living with family members in Arizona.
She was arrested on February 20, 2020, on charges of deserting and abandoning her children.
On June 9, 2020, JJ and Tylee's bodies were found buried in Daybell's backyard in Fremont County, Idaho.
On May 12, 2023, Vallow was found guilty of all charges for the murders of her two youngest children.
On July 31, 2023, Vallow was sentenced to life in prison for murder with no possibility for parole.
On June 1, 2024, Daybell was sentenced to the death penalty after being convicted of murdering his first wife and two of Vallow's children.
Daybell was also sentenced to 15 years in prison over two counts of insurance fraud.