'Doomsday mum' Lori Vallow Daybell has been found guilty of murdering her two children and conspiring to kill her husband's ex-wife. She has been charged with two counts of first-degree murder and three counts of conspiring in the deaths of her kids Tylee Ryan, 16, and Joshua 'JJ' Vallow, 7, and her husband Chad Daybell's former wife Tammy Daybell, 49.