For a long time there have been doubts about whether the Complaints Against the Police Office (CAPO), which is staffed by members of the force, is the right channel for impartial investigations of allegations against fellow officers. These doubts have been given new force by the decision of the Independent Police Complaints Council (IPCC) to uphold a complaint which CAPO had rejected. No one now disputes that Assistant Police Commissioner Dick Lee Ming-kwai ordered music by Beethoven to be played at sufficient volume to drown out protesters outside the site of the handover ceremony last summer. Given this, CAPO's initial rejection of the complaint is highly disturbing. This saga shows the problems that arise from leaving professions such as the police to investigate complaints against themselves. In this case, CAPO could not even conduct its own inquiry since all its officers are junior to Mr Lee. Instead, another more senior policeman had to be entrusted with the task. Nor did it help - from the outside viewpoint - that Mr Lee is now responsible for supervising CAPO's work, even though it must be stressed that he played no part in this investigation. Had it not been for the IPCC's subsequent review, the full facts might never have become known. So it is unfortunate that Police Commissioner Eddie Hui Ki-on should reject the verdict, especially since Mr Lee had said the music was played to help police relax. This case shows the need to give the IPCC greater authority. A bill to put it on a statutory basis was withdrawn by the administration from the pre-handover legislature after an amendment to allow the body to conduct its own investigations. Such powers are needed. It is time to reconsider what can be done to cure CAPO's inadequacies.