Vallow Daybell tells veteran host Keith Morrison on the episode of "Dateline" airing on March 7 that she believes she and her husband, Chad Daybell, are innocent of the crimes. “I will be exonerated," she said in an excerpt of the show. "We will both be exonerated in the future.”

"Mommy Doomsday" repeatedly attacks the veteran correspondent during her first prison interview: "Are you keeping track Keith? I thought we were gonna be friends, Keith!"

The mother, who is serving multiple life sentences, and her husband, who was sentenced to death, were found guilty in the deaths of her children and her husband’s previous wife.