you told them what? what did you think it was? i thought it was prostitution for sure. what else was it going to be? and i told him that. reporter: cbs5 learned the state department of justice is now investigating a claim that this was a brothel. the claim was made recently in a written confession by private investigator chris butler. butler reports that he and his friend norm welsl, the former commander of the task force were running this brothel. the two were arrested for stealing drugs confiscated by police and re-selling them on the street among other crimes. according to two sources butler confessed to investigators that he was renting this office space at 670 gregory suite b and that he hired working girls. police records indicate a neighbor called the cops. what would you see here? here? two things. they would come, knock on the door. first of all, it was always, always guys. they would knock on the door and then they would look up at the camera. the camera was r