A CONVICTED killer hanged himself with a bedsheet from an iron window bar at the Siu Lam Psychiatric Centre hours after being removed from a cell with closed-circuit television and window shutters. James Ho Chee-sing, principal officer with the Correctional Services Department (CSD), told the Coroner's Court yesterday that Tony Yeung Fuk-wing, 46, had been transferred to the centre's special unit from an ordinary ward on February 28. The unit houses either newcomers or patients with unstable mental conditions, but only eight of the 20 solitary cells were equipped with closed-circuit television and window shutters. Mr Ho was testifying at an inquest on Yeung, who was found guilty of manslaughter at the High Court on July 11, 1991, and sentenced to serve a hospital order for five years. Former seaman Yeung chopped an elderly co-tenant to death after a row on June 21, 1990. Mr Ho said yesterday that Senior Superintendent Kwok Wing-chiu was doing the ward rounds between 10 am and 11 am on March 10, when he decided to remove Yeung from Room Two - a solitary cell with closed-circuit television and shutters - to a single cell without the facilities. Mr Ho, a qualified psychiatric nurse, said: 'My decision to let Yeung stay in Room Two was overruled by Senior Superintendent Kwok.' The court heard Room Two was air-conditioned, and Mr Kwok hoped Room Seven - without air-conditioning and shutters - would give Yeung better ventilation. Mr Ho recalled that on March 9, the inmate complained of breathing difficulties but was reluctant to express himself and appeared to be 'abnormal'. He put the complaint down to Yeung's mental state. The following morning, Mr Ho managed to have Yeung examined by a doctor who confirmed Mr Ho's observation that he did not have breathing difficulties. At 3.30 pm, CSD assistant officer Chong Yuk-ping, 37, found Yeung hanging by his bedsheet from an iron window bar in Room Seven. Only 15 minutes earlier, he had looked in and found nothing untoward. Another officer had been observing Yeung through a peep window of the cell every 15 minutes. The Coroner's Court heard that during psychiatric assessment before sentencing, Yeung had expressed a long-standing delusion of persecution by a 'surveillance network' supposedly organised by his former bosses. Coroner Ian Carlson adjourned the case until October 7.