PEOPLE giving evidence of complaints against police could be videotaped, says legislator Albert Chan Wai-yip. The move was part of proposals to ensure the Complaints Against Police Office (CAPO) operated fairly and impartially, he said after meeting the Deputy Secretary for Security, Ken Woodhouse. The Security Branch would use the tape as a record in case witnesses had complaints against the CAPO officers who interviewed them, Mr Chan said. The tapes would be filed and serve as a reference for the Police Complaints Committee (PCC), the monitoring body for CAPO. According to CAPO, of the 2,569 cases investigated in the first nine months of this year, only 18 cases, or 1.3 per cent, of all endorsed cases were substantiated. This year's nine-month tally is up 10 per cent from last year's 2,343 cases. In drafting the proposal, the Security Branch would have to consider legal, procedural and resource implications in installing recording equipment, a Security Branch official said. He said videotaping the process of giving evidence was different from recording police operations. ''Police operations are held in a public area, while evidence-giving is done in the office - we have to consider whether this is legally acceptable,'' said the spokesman.