Suspicious circumstances surrounding the death of an inmate at Siu Lam Psychiatric Centre have prompted a special meeting of the Legislative Council's security panel. An inquest jury on October 11 returned an open verdict on Cheung Chi-kin, 26, a heroin addict who collapsed in a cell in the Acute Disturbed Unit at the psychiatric centre on November 19 last year. The inquest heard an autopsy found four unexplained needle marks on his shoulder. It was told the 24-hour closed-circuit camera, which was supposed to continuously monitor the patient, was not working properly and several crucial hours of footage were missing. The chairman of the security panel, Democratic Alliance for Betterment of Hong Kong legislator Lau Kong-wah, said there were problems with the case that he hoped the November 5 meeting of the Legislative Council's security panel could address. 'I understand that the police can't do any investigation, so the Legislative Council hopes to seek justice in this case,' he said. Mr Lau said the panel sought to examine the whole system governing patient detentions at Siu Lam, not just the circumstances surrounding Cheung's death. Democrat James To Kun-sun, vice-chairman of the panel, said the Legislative Council was responsible for monitoring government departments. 'We need people from the [Correctional Services] department to come out and explain,' he said. Mr To said there was no record to explain why or how Cheung received the four needle marks on his shoulder. One of the recommendations made by the inquest jury was that the centre should keep a clear record of inmates' drug intake. Mr To said the video tape also failed to show Cheung in his single cell at the time leading up to his collapse. 'The purpose is to avoid this incident from happening again,' Mr To said. 'I hope the department's representative can answer the questions,' he said. At the time of his death, Cheung had been transferred from the Lai Chi Kok Reception Centre, where he was awaiting Drug Addiction Treatment Centre reports over drug charges he was facing at Kowloon City Court. The Correctional Services Department said a task group had been appointed to study the inquest recommendations. A spokesman said that out of the 214 officers at the centre, 108 were qualified psychiatric nurses. The spokesman said all medicines, including Chlorpromazine - the drug which was found in lethal doses in Cheung's system - could only be taken from the dispensary on prescription by a medical officer.