The police interrogation recordings of the Colorado dad who murdered his pregnant wife and two young daughters — while courting a mistress — are now public, along with the detectives interview of the girlfriend.

Nancy Grace takes a long look at the lies of Chris Watts in this extended Crime Stories episode. She is join by deception & body language expert Susan Constantine, private investigator Vincent Hill — author of “Playbook to a Murder,” Atlanta juvenile judge & lawyer Ashley Willcott, and CrimeOnline reporter Ellen Killoran.

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’.

SEE IT: Chris Watts gets ‘fan’ mail, photos, love letters in jail after murdering his pregnant wife and two daughters

“Crime Stories with Nancy Grace” is also a national radio show heard on SiriusXM channel 111 airing for two hours daily starting at 12 p.m. ET and around the country on local radio stations. You can also subscribe and download the daily podcasts at Apple Podcasts and Google Play.

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

[Feature Photo: Chris Watts/Police Handout]