vegas? here's abc's jim avila. >> reporter: tonight, o.j. simpson banned from a las vegas hotel. >> orenthal's here. cosmo near the jockey club. >> reporter: simpson spent several hours at a bar and restaurant before leaving at midnight. it is not known why the hotel has banned simpson. he could be arrested if he comes back on the property. >> i've never had an alcohol problem. >> reporter: since his release, he's been seen in numerous vegas hotels, posing with fans. at his july hearing, parole conditions were made clear. one of them, no excess drinking. >> haven't drank in nine years, i haven't missed it. >> reporter: the person who took this photo from last night says simpson did not appear to be drinking and she didn't hear a commotion. his lawyer says simpson did nothing wrong. >> everything else that's been reported, completely exaggerated, made up and false. >> reporter: las vegas police are saying tonight, they weren't involved. it was handled totally by the hotel security. cosmopolitan has no comment. david? >> jim, thank you. when we come back, senator rand paul's attacker in court