Baton Rouge police Friday arrested a 34-year-old man accused of sexually assaulting a 13-year-old girl.

Mateo Sosa inappropriately touched the victim on multiple occasions during the summer of 2008, according to an arrest report.

The first attacked happened after Sosa took the victim into a bedroom and showed her pornography, the report says. He began masturbating and told the victim he was “teaching her about sex,” the report says.

Sosa also repeatedly crawled into the victim’s bed while she was sleeping and on at least one occasion inappropriately touched her, the victim told detectives.

During a controlled phone with the victim and detectives, Sosa admitted the attacks and acknowledged they have affected the victim’s life.

Sosa, 4019 N. Sherwood Forest Blvd., Baton Rouge, was booked into Parish Prison on counts of indecent behavior with a juvenile and sexual battery.