Chad Daybell has been sentenced to death by a jury in Idaho for the murders of his wife and his girlfriend's two youngest children.

The seven-week trial found Daybell guilty of three counts of first-degree murder, conspiracy to commit murder, and insurance fraud.

Prosecutors argued that Daybell and his wife, Lori Vallow Daybell, conspired to kill the children and Daybell's former wife for their relationship and financial gain.

The prosecution presented evidence of a belief system involving 'zombies' and apocalyptic ideologies that justified the killings.

Daybell's defense claimed that Vallow Daybell and her late brother were responsible for the crimes.

Emotional impact statements from family members during the sentencing phase brought some closure and justice to the families.

Lori Vallow Daybell was previously convicted of murdering her children and is serving a life sentence without parole.