The grieving parents and brother of Shannan Watts will appear on “Dr. Phil” next week to discuss the harrowing details of a new, full confession Chris Watts gave investigators last month from a Wisconsin prison where he is serving multiple life sentences for the murders of his pregnant wife and two daughters, 4-year-old Bella and 3-year-old Celeste.

Sandra and Frank Rzucek, joined by Shanann’s brother Frankie, sat down with Dr. Phil and shared their reaction to the heartbreaking details Watts confessed to investigators about the murders of his wife and daughters. As CrimeOnline previously reported, Watts admitted to strangling Shanann after revealing that he was having an affair and that he wanted to end the marriage. Shockingly, he also revealed that his two little girls were still alive when he drove them, with their mother’s body, to an oil site where he buried Shanann and killed his daughters before dropping each of their bodies into an oil well. Watts admitted that Bella not only saw him carrying Shanann’s body down the stairs of her home, but witnessed her sister’s murder before asking her father if he was going to do the same to her.

Watts said that Bella’s last words were, “Daddy, no!”

The Rzucek’s lawyers said in part one of the two-part Dr. Phil episode that Shannan’s family had been made privy to the new, horrific details of the murder before the Colorado Bureau Investigation released an audio recording and written transcript of Watts’s prison confession.

How do you protect your children from predators? Join Nancy Grace and a team of world class experts for the online course ‘Justice Nation: Crime Stops Here’.

In the preview clip of the interview, Frank Rzucek recounts to Dr. Phil the last known moments of his daughter’s life, and her brother and mother share their shock and grief at learning the disturbing details of the murders.

“It’s worse than we ever thought,” Frankie Rzucek says in the clip. “We thought we’d heard the worst already, we had no idea it was worse than this.”

“I cry all the time. There’s many times that I feel like giving up. If it wasn’t for God, I wouldn’t be here,” Sandra Rzucek says.

The full interview will air on Dr. Phil on Tuesday, March 11.

Join Nancy Grace for her new video series new online video series designed to help you protect what you love most – your children.