Chris Watts’ lie detector test lasted 7 hours and his scores were rock-bottom

Chris Watts was hooked up to a polygraph machine being quizzed over the disappearance of his wife Shanann and their two little girls for seven hours.

Chris, then 35, brutally murdered his pregnant wife Shanann, 34, and their two daughters Bella, four and Celeste aged three in 2018.

True crime fans saw a segment of the dad-of-two being questioned about their strange disappearance while hooked up to a 'lie detector' in Netflix documentary, American Murder: The Family Next Door, but there was a chilling detail producers didn't include.

Not only did Chris withstand seven hours of questioning about where they might have vanished to, knowing full well they were all dead at his own hands – but his scores left cops and the polygraph operator gobsmacked.

His scores came back at minus 18 – the accepted score for someone lying is around minus four.

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Chris only confessed to the murder of his wife and children after he was told of his shockingly low score.

He confessed he was "not a good man" and dumped his daughters' bodies in a "freakin' oil tank". His pregnant wife was buried in a shallow grave nearby.

Polygraph tests can not be used as evidence in court, but the results clearly spooked him in to coming clean.

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He was arrested and charged, and during a separate five hour interview with police, revealed how he strangled his wife after an argument about getting divorced.

The couple's small children were in the house when it happened, and he told cops that their eldest daughter Bella saw him dragging her mum's body down the stairs.

He told police that the little girl asked: “What is wrong with Mommy?”

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After putting Shanann's body on the floor of the backseat of his truck, he loaded his daughters in to the backseat and drove them about 45 minutes to the oil site where he worked.

Upon arrival, he told cops that he smothered Celeste with a blanket and dropped her in an oil tank, before doing the same to Bella.

The little girl again asked him a question that will undoubtedly haunt him forever.

  • Horrifying detail of how Chris Watts murdered daughters left out of Netflix documentary

She asked: “Is the same thing gonna happen to me as Cece?”

It is thought that Chris killed his family because he had begun an affair with a coworker, and wanted to start a new life.

Originally he claimed that his wife had killed the girls as punishment for him wanting to break up the family unit.

He claimed that he had seen his wife strangling Celeste via the baby monitor and that Bella was lying on her bed and appeared blue. He then claimed he went into a rage and strangled Ms. Watts before disposing of all three bodies at the oil site.

He eventually gave up this sickeningly lie, and admitted to all three murders.

In November 2018 he was sentenced to five life sentences without the possibility of parole.

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