Chad Guy Daybell was born August 11, 1968 in Provo, Utah. He married Tamara "Tammy" Douglas in Manti, Utah on March 9, 1990. After graduating from Brigham Young University in 1992 with a B.A. in journalism,Daybell worked as a cemetery sexton, before establishing end of days publisher Spring Creek Book Company, in 2004, with his wife, a graphic artist and manager. Chad and Tammy had 5 children: Garth, Emma, Seth, Leah, and Mark.
In 2015, Chad Daybell allegedly twice heard a voice telling him to relocate to Rexburg, Idaho; he and Tammy moved there from Springville, Utah that June. Tamara passed away on October 20, 2019. Chad Daybell married Lori Vallow on November 5, 2019 in Hawaii.
Daybell was convicted of three counts of first-degree murder for the deaths of Tammy Daybell, his late wife, JJ Vallow and Tylee Ryan, his current wife's two children.
On May 30, 2024, Chad was found guilty of all charges related to the deaths of his first wife and of Lori's children. On June 1, 2024, he was sentenced to death.