"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!"

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.”

Keith Morrison has spoken with dozens of inmates over his career but says nothing comes close to his jailhouse interview with Lori Vallow Daybell. “I don’t think I’d try to compare it with anything. She is a very interesting person to talk to,