Chris Watts 'would daydream' about killing Shanann Watts before horrific murders, prison pen-pal claims in doc

Cheryln Cadle, a married grandmother of 12, recalled her correspondence with Chris Watts in "Cellmate Secrets," a true-crime docuseries on Lifetime narrated by Angie Harmon.

The show features new interviews with Cadle, who went on to become Watts’ prison pen-pal, along with cellmate Dylan Tallman and others associated with the case. "When I saw his first interview, I don’t know, I looked at him that morning and I just felt something really spoke to me," the married grandmother of 12 told Fox News. "It was like a calling for me to contact him and see if he would share his story with me. I knew he was guilty. You could tell by the way he was talking, the body language. But it was just one of those things where I really felt like I was supposed to do it."