A policeman arrested for allegedly arranging the murder of his wife offered one of the contract killers $500,000 to take all the blame, the High Court heard yesterday. Raymond Ng Wai-man, 31, a detective constable, said the money would help support Wong Tat-chuen's family while he served his prison sentence, the court heard. Wong, 32, an ice-cream seller, had already told police that Ng hired him to help kill his wife so he could cash in her life insurance policy. When they met in the cells at Kwun Tong Court, Ng told him to retract the confessions and claim the police had forced him to make them against his will, the court heard. Wong said the detective wanted him to change his story and to say the killing happened by accident. This would lead to Wong being sentenced for manslaughter only and Ng escaping altogether, the court heard. Wong told the police: 'He said he could give me $500,000 as a family consideration fee to take care of my family until I was released from prison.' But Wong rejected the offer and later that day told the police everything Ng had said to him, the court heard. He said he had sworn at Ng and asked him: 'Are you kidding?' Wong has pleaded guilty to the manslaughter of Ng's wife, Choy Sau-han, 27, a bank clerk. He denies murder. Ng is not on trial. Choy was lured into a car with Wong and Leung Siu-fai, who has fled to China. Wong repeatedly battered her over the head with a brick and Leung strangled her, the court heard. Her body was then dumped in the sea. Wong confessed soon after his arrest, and took police to the scene of last October's killing. He said: 'I cannot bear the condemnation of my conscience.' Michael Poll, defending, said Wong told the police he had refused to get involved in the murder when the idea was first put to him by Ng and Leung. But they later said the plot was only to kidnap Choy for a ransom. He agreed and his role was to knock her out. Mr Poll said Wong remonstrated with Leung when he strangled Choy. He was told he had been duped and the plan was to kill her all along. The barrister suggested the police had persuaded Wong to alter his story to strengthen the allegations against Ng. This was denied by Detective Sergeant Chu Kwong-wah. The trial continues today.