A security guard who believed he was a cat in a previous life killed his parents by chopping them a total of 129 times in the hope of being reborn as the king of cats, a court heard yesterday. Chan Sze-kin, 26, denied two counts of murder on the grounds of diminished responsibility but pleaded guilty to manslaughter. The pleas were accepted. Mr Justice Thomas Gall ordered that Chan be detained at Siu Lam Psychiatric Centre for an unspecified period. Chan, a schizophrenic, had received no psychiatric treatment before the killings at the family's home in King's Road, Quarry Bay, on March 19 this year, prosecutor William Lam told the Court of First Instance. At the beginning of last year, Chan started to believe he was being investigated for corruption and followed and also began hearing voices. He confided in his parents, who showed little sympathy, the court heard. Three days before the killings, Chan's 'imaginary voices told him that if he killed his parents, he would be reborn as the king of cats', Mr Lam said. After working a night shift, the security guard woke at midday and stayed in his room for about four hours. 'He then went into the kitchen and took a chopper, and without saying a word, hacked the head of his mother who was sitting on a chair,' Mr Lam said. 'When his father [arrived] the defendant hacked him also. He heard electronic sounds as he attacked his parents.' Mother Leung Mui-ying, 55, received 67 chop wounds, while father Chan Hing-wing, 67, was attacked 62 times. Chan bathed and then went for a sauna and massage. Police found him two days later sleeping in a park in Dundas Street, Mongkok. He later told officers about the killings. Jeffrey Fenton, defending, said: 'Both his parents had a history of mental illness. It's a sad situation.'