A man who decapitated his 19-year-old ex-girlfriend was found guilty of murder yesterday. Jurors delivered their unanimous verdict after a Court of First Instance trial that heard Leung Pak-ming, 26, had repeatedly stabbed and then beheaded Wilma Li Yui-yi at her Kwai Chung flat on March 7 last year. Leung placed the severed head by Li's side, then called police. The killer, flanked by five security guards, bowed his head after the verdict yesterday. Mrs Justice Verina Bokhary sentenced him to an automatic life term. 'The sentence for murder is one prescribed by law,' she said. 'Therefore, I sentence you to life imprisonment.' The jury - five women and two men - had to decide whether Leung was guilty of an intentional killing or the lesser charge of manslaughter. Leung offered to plead guilty to manslaughter, saying he had not planned to kill the victim. Prosecutors rejected his offer. Last week, Leung sobbed as he started testifying. He had refused to look at the gruesome crime scene photographs and wept after his victim's sister left court in tears, too distraught to testify. Li's sister and boyfriend had chatted with Leung on the morning of the killing. Leung told them he wanted to return a bag of clothes to Li. Leung left after the couple offered to give the clothes back. He later returned and murdered Li. What happened inside the flat was key to the trial. Leung said he went to Li's home to reunite with her. When she refused and yelled at him, Leung said he stabbed the woman. Senior public prosecutor Polly Wan Shuk-fong asked Leung why he took two knives with him that morning. Ms Wan portrayed Leung as a jealous, controlling man who murdered Li because she had refused to resume their relationship. Leung, she argued, had told police he cut off Li's head to make sure she was dead. Leung insisted that he lied to police. Leung, who had no criminal record or history of violence, testified that he had planned to kill himself with the knives if Li rejected him. But he never followed through on that plan, to ensure that police cordoned off the scene to prevent the victims' mother seeing her headless daughter on the floor, Leung said. Killers who behead their victims tend to be mentally ill, but Leung did not fit that profile, a forensic psychiatrist testified. 'He had no psychotic symptoms. There was no loss of contact with reality,' Henry Yuen Cheung-hang, chief of service in forensic psychiatry at Castle Peak Hospital, had testified. 'He knew very well the nature of his act. He knew it was legally wrong.' Leung suffered from depression and had a 'moderate' adjustment disorder stemming from the break-up of the relationship, he said. But he rejected suggestions that Leung had suffered from temporary insanity.