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.”

The interview took place at a jail in Maricopa County and detailed the months leading up to the murders of Vallow Daybell's children, Tylee and JJ.

"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!"