A GRIEVING mother yesterday accused a Coroner's Court witness of murdering her daughter. Sobbing uncontrollably, Tse Hau-kam, 50, faced the man across the court and said: 'Chan Ping was killed by you.' The witness, Cheung Tak-chuen, 24, one of the dead woman's two boyfriends, protested his innocence, saying 'no, no'. Coroner Warner Banks told the mother Mr Cheung did not have to answer any questions which might incriminate him. The accusation came during an inquest into the death of Chan Ping, 22, whose decomposing body was found on a deserted mountainside near Tai Mo Shan Road on September 3 last year. The jury returned an open verdict after Mr Banks told it an extensive investigation had not revealed any conclusive evidence. The inquest was told the religious young woman, who was identified partly as a result of fingerprints found on her Bible, became involved in a love triangle after leaving China for Hong Kong. Mr Banks issued warrants for the arrest of Chan's other boyfriend, Chu Kwok-leung, 36, and his work-mate Loo Kwok-ming, both of whom failed to arrive at court to give evidence. Outside court, the woman's mother said she was unhappy with the verdict. Detective Inspector Timothy Bennett appealed for witnesses to come forward. He said he was particularly interested in speaking to anyone who was near Chan's flat at Miami Beach Towers, Castle Peak, on August 16 last year, the last day she was seen alive. If further information was not forthcoming, it was likely the investigation would be closed, he said. Forest guard Yeung Loi discovered Chan's body after he saw a pair of white slippers lying by the roadside. Pathologist Dr Wong Hon-man said it was impossible to determine the cause of death because the body was so badly decomposed. There were no identifiable injuries or diseases. The court heard chemicals found in heroin were identified in Chan's liver. But there was no evidence she was in the habit of taking drugs. Mr Cheung said he first met Chan early last year and started having a sexual relationship with her after she returned from a visit to China the following June. Mr Cheung said he and Chan lived together for a few weeks. But, on August 16 last year, she moved to the flat in Tuen Mun, which was rented by another man. Mr Cheung said he had paged her a couple of days later but she did not reply. When he could not find her, he reported her disappearance to the police.