1. One Last Conversation With Chris

Yet, as Chris went on to plead guilty to all the murders, investigators were left without answers as to why Watts killed his entire family. Thus, six months after the murders, the investigators chose to speak with Chris in prison.

"I needed to hear him say that Shanann did not murder her children," Lee relayed. "I needed to have that come out of his mouth."

And, as heard through audio recordings, Watts admitted to killing his wife after telling her he didn't love her anymore. To make matters worse, Watts said his daughters were alive and in the car with him as he drove Shanann's body to the burial site.

"Nobody had ever contemplated, that I recall in any discussion, that the girls were alive when he drove them out to the oil site," Chief Deputy Weld County DA Steve Wrenn said.

As Watts told Lee and the other investigators, after burying Shanann, he smothered Celeste and deposited her body in a tank, all while Bella was watching. He then did the same thing to the oldest Watts child.

"Chris told us that, every night when he closes his eyes, he hears Bella yell, 'Daddy no!'" Lee concluded. "I feel like it's kind of what he deserves. I hope he hears that every night."

What moment from Saturday's all-new Criminal Confessions stood out most to you? Be sure to let us know.

Criminal Confessions airs Saturdays at 6 p.m. ET/PT on Oxygen.

(E! and Oxygen are both part of the NBCUniversal family.)

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