TAHLEQUAH, Okla. – A Tahlequah man was arrested after being accused of a horrific crime.

Investigators arrested 47-year-old Billy Hershel Smith on complaints of lewd molestation and possession or production of child pornography.

Authorities at the Cherokee County Sheriff’s Office told the Tahlequah Daily Press that they started an investigation after the FBI received an anonymous tip about a pornographic video featuring a young girl and a man.

Agents soon traced the video to Smith’s home in Tahlequah.

During an interview with investigators, Smith reportedly confessed that he forced a 13-year-old relative to perform oral sex on him while he recorded it on his cell phone.

The Daily Press reports that Smith said the girl suffered from medical issues and described her condition as “terminal,” adding that she functions at the level of a toddler.