The child suffered 30 wounds in the two weeks before his death, but his mother did nothing - and then helped her boyfriend flee A jobless ex-convict killed his lover's eight-month-old son out of frustration, fatally injuring the baby over two weeks, a court heard yesterday. And his girlfriend, now pregnant by another man, gave him time and money to escape before alerting police. Kow Chi-ming, 35, pleaded guilty to manslaughter in the Court of First Instance. Prosecutor Diane Crebbin told the court an autopsy found Ng Tsz-kin suffered 30 wounds in the two weeks before his death on June 20, 2003. Kow, who has 17 previous criminal convictions, moved in with Ng Bik-fung, 27, a hostess at a Mongkok nightclub, in May 2003, shortly after his release from prison. Kow and Ng were jointly charged with one count of wilfully ill-treating or neglecting the baby. Kow was entrusted with caring for the baby whenever Ng worked between 10pm and 5am. Mughal Hanif, counsel for Kow, said in mitigation that Kow was physically abused by his father between the ages of 10 and 12. '[Kow] became frustrated and could not cope with the incessant crying, and out of sheer frustration and lack of self-esteem, [he] committed the fatal injuries,' he said. Kow was deeply and genuinely remorseful, he said. The prosecution told the court that on the night of June 19, 2003, Ng went to work as usual and left Kow looking after the baby. Ng returned early the next day and thought the baby was asleep. She did not discover the boy was dead until 8am, when she found he had bruises and injuries to his face and his lips were purplish and hands cold. Kow then confessed he had killed the baby but said he had not intended to. But Ng only told police of her son's death after giving Kow time and money to flee to the mainland. Kow told police in recorded interviews after his arrest in Hong Kong that while changing the baby's nappy, he somehow lost his balance and landed on the baby's stomach. He told police the boy had a heartbeat initially but then his face turned black and he stopped breathing. Kow covered him with a quilt to hide his death. Ng pleaded guilty to the joint child neglect charge, while Kow pleaded not guilty. The prosecution said Ng had to have seen the injuries on the boy over the two weeks before his death when she bathed and changed him. It also noted she had never sought medical treatment for his injuries. Forensic pathologist Wong Hon-man said the cause of death was a fatal head injury and brain haemorrhage inflicted by blunt force. He found 30 injuries, including bruises and abrasions, all over the boy's body. James McGowan, counsel for Ng, said in mitigation that Ng, who left school at 15, grew up in a broken family without parental guidance. He said Ng, who was now in a stable relationship with another man, was five months' pregnant. Deputy Judge Judianna Barnes Wai-ling adjourned the case until May 13 for sentencing.