Chad Daybell originally told police that Tammy Daybell had died in her sleep after she went to bed with a cough.

Source: https://www.deseret.com/2023/4/10/23677433/tammy-daybell-cause-of-death-lori-vallow-trial-opening-arguments

It was also discovered that Lori Daybell conspired with her husband, Chad Daybell, to kill the latter’s first wife, Tammy Daybell, in the same year.

Source: http://davidsonian.com/2023/08/04/after-murdering-her-children-in-2019-lori-daybell-smirks-in-her-prison-booking-photo-despite-life-imprisonment-without-parole-on-monday/

JJ’s father Charles Vallow — who Vallow Daybell was married to when she met Chad Daybell — was shot and killed by Vallow Daybell’s brother, Alex Cox.

Source: https://ktar.com/story/5482259/guilty-or-not-jury-to-hear-claims-in-idaho-slain-kids-case/

The husband, Chad Daybell, is awaiting trial on the same murder charges.

Source: https://www.sltrib.com/news/nation-world/2023/07/31/idaho-mom-lori-vallow-daybell/