A Lufkin man is behind bars after police found him having sex with a minor. Set Garcia Venegas was arrested when a police officer saw his pick up truck parked in a vacant parking lot. The officer approached the vehicle and saw Venegas and a 14 year old girl having sexual relations. The man admitted to police they did have sex. He was arrested and now faces charges of sexual assault of a child. According to reports Venegas has another case open dealing with the same girl from a few months ago.