Deputies have Robert Brownarrested a 23-year-old Oklahoma man accused of posing as a teenager to have sex with underage girls.

Holden Brook Clayton has been charged with the rape of a child under the age of 14. Authorities say more charges are possible as investigators work to identify more potential victims.

Clayton's attorney, Lance Phillips, did not immediately return messages seeking comment from USA TODAY on Thursday.

The investigation

The investigation began on Aug. 8 when the Yukon Police Department got a call from a woman reporting that her 13-year-old granddaughter had run away from home. Using the girl's cellphone signal to pinpoint her location, officers were able to track the the teen to a car.

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Police said they found the girl and Clayton inside.

The Oklahoma County Sheriff's Office became involved in the investigation, during which the agency said that Clayton admitted to posing as a teenager to meet with the girl and have sex with her.

While investigators interviewed Clayton, the sheriff's office said he admitted that the ruse had allowed him to abuse three other girls between 13 and 16 years old in the past year.

Officers also say they found child pornography while examining Clayton's cellphone, including videos and pictures of girls ranging from 8 to 16 years old.

Court appearance

Clayton has made his first court appearance, where he pleaded not guilty.

His next court hearing is set for Nov. 16.

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The sheriff's office is asking that anyone with information about Clayton's additional alleged victims call its office at at 405-713-1000.