The mother of a murdered bank clerk wept in the witness box yesterday as she told the High Court how she received 'frightening' telephone calls on the day her daughter disappeared. Yeung Mui-ying said a mysterious caller told her to search for a wallet near her home on October 19, 1995. When she could not find it, the man told her she was stupid and said she should go to the refuse room on the 35th floor. Ms Yeung said she ran into her daughter's husband, policeman Raymond Ng Wai-man, on her way to look for the wallet. Ng denies hiring two hitmen to murder his wife, Choy Sau-han, 27. Ms Yeung said he went with her to the refuse room where they found her daughter's handbag on top of a dustbin. There appeared to be $2,000 missing. A report was made to the police and Ng went to deal with it. Ms Yeung then returned to her home where she received another call. She said she tried to trick the caller by pretending she had not found the bag. Ms Yeung did not recognise the man's voice and failed to persuade him to give his name or address. Choy was murdered by two contract killers who battered her with a brick, strangled her and dumped her body in the sea, the court has heard. The prosecution claims Ng hired the killers so he could cash in on his wife's life insurance. He denies murder. The trial before Mr Justice Arthur Leong Shiu-chung continues.