A FORMER policeman who took part in a spate of armed robberies while he was a CID officer yesterday apologised for bringing the force into disrepute. Tsang Chi-fai, 32, who described himself as a ''black sheep'' in the force, also said he hoped the public would not lose faith in the police merely because of his selfish and foolish deeds. Mr Justice Leong sentenced him to 22 years' jail. It was distressing to see a CID officer involved in such serious crime, the judge said, holding that the fact Tsang was a policeman was an aggravating feature. The judge sentenced Tsang's accomplice, Lee Chun-man, 27 - a construction site worker - to 22 years' jail. He said the raids were large-scale and well planned robberies committed in high-class jewellery shops in hotels or busy commercial areas. Firearms were used and an enormous amount of valuables were taken, he said. In sentencing, Mr Justice Leong took 24 years as a starting point and reduced the sentences by two years for the guilty pleas. Tsang, who joined the police in 1979, and Lee had each pleaded guilty to five counts of robbery. According to Senior Crown Counsel Richard Donald, they were members of a syndicate which had conducted a series of armed robberies at jewellery shops between 1986 and 1991. Valuables in excess of $124 million were snatched in 16 holdups, and Tsang and Lee had each taken part in five of them, three together and two with other gang members. More than $74 million in valuables were taken in the raids involving the defendants. Cash totalling $457,000 was also stolen. In most of the robberies, guns were used and on some occasions staff members of the shops were threatened and assaulted. Counsel for Tsang and Lee, Wong Po-wing, said his clients were not the prime movers. He said both had incurred large gambling debts. In Tsang's case, he said, while he committed the offences when he was a serving policeman he had not used any information he had obtained while on duty to commit the crimes. In that way he had not abused his position as a police officer, said counsel, adding that neither Tsang nor Lee had carried a gun during the holdups. Following his counsel's submission Tsang told the court he realised his actions had brought disrepute to the force. However, he said, what he did was a result of his own selfishness and folly. Tsang apologised to his former superiors and colleagues and also his victims.