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The 18-year-old man already charged with murder and accused of filming a Spanish Fork teen's hanging had child pornography on his phone, according to court documents.

Tyerell Przybycien, 18, was charged Wednesday in 4th District Court in Provo with four counts of sexual exploitation of a minor. Each count carries up to 15 years in prison.

A probable cause statement filed with the charges said Przybycien's phone was examined as part of the murder investigation. A detective wrote that multiple nude images of girls under the age of 5 were found.

A witness, described in the statement as a "female juvenile" was interviewed and provided a social media message from Przybycien "stating he had an issue with child pornography."

"I interviewed Przybycien about the images," a detective wrote. "He admitted he was responsible for them and was struggling with child pornography."

Przybycien was already charged with first-degree felony murder and abuse or desecration of a dead human body, a misdemeanor. Prosecutors and court documents accuse Przybycien of buying a rope a 16-year-old girl used to hang herself May 6 in Payson Canyon. Przybycien filmed her death with her cellphone, court documents allege.

As a result of the murder charge, he is being held in the Utah County jail in lieu of $500,000 bail. A hearing in that case has been scheduled for May 30.

Twitter: @natecarlisle