A rookie police officer who shot a man dead may face prosecution after a Coroner's Court jury declared his action unlawful yesterday. The jury also called for tighter measures on police use of firearms. Constable Chong Ka-man, 20, had just completed his six-month cadet training when he shot dead an illegal rooftop dweller, the inquest heard. The jury said: 'We wish to express our concern about the proper use of firearms by young and inexperienced officers and feel that the training programme may need to be revised in order to provide more emphasis on this.' Coroner John Saunders said the report would be forwarded to the Police Commissioner and the Legal Department for their consideration. Constable Chong and two colleagues went to the roof of a building in Hong Lok Street, Mongkok, on September 21 last year after reports that a man had attacked a security guard. The unidentified man, aged between 50 and 60, had attacked the guard with a paint scraper after being challenged for trespassing. When the police arrived, the man attacked them with a chopper, claiming they had killed his mother, the court heard. Constable Chong said the man was told to put down the chopper. 'He ignored our warnings and didn't put down the chopper. Then he attacked our colleague standing in the front.' The man died after being hit twice in the chest. The constable said he thought his colleague could be chopped to death and the two-metre distance between him and the attacker meant he could not use his baton. But scientific evidence suggested the two shots were fired within a range of 60 to 120 centimetres. Another officer, Hau Kin-chung, who defended himself against the man with his police cap, received a one-centimetre cut to his thumb. Constable Chong said he did not think he could have used less force. 'I fired the second shot because the man didn't stop his attack,' he said. 'I didn't know at that time whether the first shot hit him or not.' The officer finished his six-month training in August last year and had been on the beat for about a month. Assistant Commissioner of Police, Personnel, Angus Stevenson-Hamilton said papers on the case would be passed to the Director of Public Prosecutions. He responded to the jury's call for a review of firearms policy by saying: 'That is something that cannot be ignored.'