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Colorado dad says he killed wife after he saw her strangling daughter: court documents

Click to play video: 'Police lay five first-degree murder charges against Colorado man' Police lay five first-degree murder charges against Colorado man
ABOVE: The Colorado man suspected of murdering his family claims he killed his wife after she strangled their children. – Aug 21, 2018

The father of two young girls found submerged in oil tanks after being missing for days told authorities his pregnant wife killed the children after learning he wanted a separation, and that he erupted in rage after witnessing the killings and strangled their mother inside the family’s suburban Denver home, according to court documents.

Days after letting police inside his home so they could help find his missing family, Christopher Watts told investigators “he would tell the truth.”

READ MORE: Colorado man charged with murder in deaths of pregnant wife, 2 daughters

Watts first asked to speak with his father then admitted to killing his wife, Shanann. Watts told police in court papers released Monday that he killed her after witnessing her strangling one of the girls on a baby monitor. The other child had already been killed by the woman, he said.

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Watts, 33, faces three first-degree murder charges, two counts of murdering a child under 12, one count of unlawful termination of a pregnancy and three counts of tampering with a deceased human body. He is scheduled to appear in court on Tuesday and is being held without bail.

WATCH: Authorities announce formal charges against Colorado man who allegedly murdered wife and children

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Authorities announce formal charges against Colorado man who allegedly murdered wife and children – Aug 20, 2018

District Attorney Michael Rourke declined to answer questions about the case Monday but said his office has three prosecutors working on it. Rourke also said it was too early to discuss whether he will seek the death penalty.

Police first visited the family’s house on Aug. 13, after a friend asked officers to check on Shanann Watts. She had missed a doctor’s appointment and wasn’t answering calls or text messages hours after returning home after a business trip, the friend reported.

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With Christopher Watts’ approval, police searched the house and found his wife’s cellphone stuffed inside a couch. Her purse was on a kitchen island and a suitcase was at the bottom of the stairs.

WATCH: Colorado girls’ bodies found stuffed in oil tanks

Click to play video: 'Colorado girls’ bodies stuffed in oil tanks' Colorado girls’ bodies stuffed in oil tanks
Colorado girls’ bodies stuffed in oil tanks – Aug 18, 2018

A detective spoke to Christopher Watts and learned about his separation plans. Watts first described the conversation with Shannan as civil but later told police that “they were both upset and crying” and she planned to go to a friend’s house that day, the court papers said.

When Shanann Watts and the girls did not return home by Tuesday morning, investigators ramped up their efforts with the help of the Colorado Bureau of Investigation and the Federal Bureau of Investigation. Christopher Watts was interviewed by several local television stations, asking for the return of his family and discussing how much he missed spending time with his children.

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READ MORE: Bodies found in search for missing Colorado family; husband in custody

It wasn’t until Wednesday night that he made his promise to tell police the truth.

According to Watts’ account, the early hours of Aug. 13 began with an intense conversation. He said he told his wife that he wanted a separation. Separately in the papers released Monday, investigators said they learned that Watts was “actively involved in an affair with a co-worker,” something he denied in earlier conversations with police.

Watts told police that after discussing the separation he walked downstairs.

When he returned, he told them he spotted a baby monitor on his wife’s nightstand – displaying her “actively strangling” their 3-year-old daughter, Celeste. He said the video feed also showed their other daughter, 4-year-old Bella, “sprawled out on her bed and blue.”

“Chris said he went into a rage and ultimately strangled Shanann to death,” the document said.

Police found surveillance video from a neighbour showing Watts’ truck backing into the driveway at 5:27 a.m. and shortly after driving away from the house in Frederick, a small town on the grassy plains north of Denver where fast-growing subdivisions like the one the Watts family lived in intermingle with drilling rigs and oil wells.

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Watts, an operator with Anadarko Petroleum, said he loaded his wife and daughters’ bodies into the back seat of his truck and drove to an oil work site about 65 kilometres east of the family’s home. There, he buried Shanann Watts’ body and “dumped the girls inside” oil tanks, according to the court document.

Separate court documents filed by Watts’ defence attorney last week said the girls’ bodies were submerged in crude oil for four days before police found the remains late Thursday. Their mother’s body was found nearby, in a shallow grave, according to prosecutors.

WATCH: Father of slain woman sobs in court as alleged killer has charges read out

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Father of slain woman sobs in court as alleged killer has charges read – Aug 22, 2018

Anadarko, one of Colorado’s largest oil and gas drillers, has since fired Watts.

The court filing says Watts gave police an aerial photograph of the area and identified three areas where he placed the bodies. Investigators used a drone to search the area and spotted a bed sheet that matched other linens in the family home, along with fresh dirt.

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Shanann Watts’ social media social media posts show the girls playing with their father and each other. The couple married in North Carolina nearly six years ago, and moved to Colorado soon after.

Shanann’s father, Frank Rzucek, spoke to reporters for the first time on Monday. In a statement, he thanked police for their efforts, along with friends and neighbours who organized a candlelight vigil outside the family’s home last week.

“Keep the prayers coming for our family,” Rzucek said.

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