Four police officers went free on bail yesterday, two weeks after they were convicted of torturing a suspect until he lost consciousness. A Court of First Instance Judge released a woman police inspector and her three subordinates on bail pending their appeal against conviction. The ruling overturned a magistrate's decision to keep them behind bars. The women, Inspector Chuen Lai-sze, 36, and Sergeant Choi Wing-yee, 32, and male constables Cheuk Lam-kan, 24, and Ho Fat-ming, 27, were found guilty in Tsuen Wan Court of assault causing actual bodily harm. Tsuen Wan magistrate Alison Thompson sentenced Chuen and Choi to six months in prison. Cheuk and Ho received four-month terms. However, Mr Justice Thomas Gall yesterday released the officers on $50,000 bail with a $50,000 cash surety. Their trial heard that the victim was 23-year-old drug suspect Yiu So-man. On March 3 last year, the officers tortured Mr Yiu in a Tsuen Wan flat, the court was told. They stuffed a sports shoe into Mr Yiu's mouth and demanded he admit possession of 56 grams of heroin that Choi claimed was found with his methadone card. Chuen, who was in charge of the team, allegedly poured water from a soft drink can into Mr Yiu's nose and ears until he fainted. The officers also carried him to the balcony, with Chuen threatening to drop him 60 metres to the pavement below, the court heard. Mr Yiu filed a formal complaint the next day at Tsuen Wan police station. An investigation discovered Choi's prints on a soft drink can found in the room and an enzyme suggesting the presence of saliva on two sports shoes. Mr Yiu, who admitted in court being a heroin addict, has not been charged over the alleged drug find. Chuen joined the force as a constable in 1982 and was promoted to sergeant in 1991 and to inspector in 1994. She took command of her eight-strong team in Kwai Tsing Special Duty Squad in 1996.