Updated at 7.36pm: A leading Hong Kong coroner advised the inquest into the shoot-out deaths of three policemen and a bank security guard on Monday to concentrate on key facts of case. The two-month inquest entered its final stage as Coroner Michael Chan Pik-kiu gave directions to a five-people jury, who would deliver a verdict on the cause of the four deaths. Mr Chan reminded the three-man, two-woman jury the aim of the inquest was to determine the key facts on the deaths ? such as the circumstances, time, and place and where the victims died. It was beyond the inquest?s power to establish criminal liability or compensation for the killings. These were areas best left to other courts to examine, Mr Chan said. The coroner said analysis by overseas criminal experts on the behaviour of dead constable Tsui Po-ko, who was alleged to have killed the other three people, could only help them to learn more about what type of person he was. Their speculation on the likelihood of Tsui committing the three killings should be taken as opinion only, the coroner said. The inquest was examining the death of Constable Leung Shing-yan, who was shot dead on a Tsuen Wan housing estate on March 14, 2001, when he was going to answer a bogus noise complaint. His service revolver was missing from his body. It also investigated the killing of Hang Seng Bank security guard Zafar Iqbal Khan during an armed robbery on December 5, 2001. The court has heard that a masked man used a police pistol to shoot Khan dead before robbing HK$500,000 from the bank branch in Tsuen Wan. On the early hours of March 17 last year, Constable Tsang Kwok-hang and that of the off-duty Tsui were found dead, both with gunshot wounds, in a Tsim Sha Tsui underpass. Leung?s revolver was found under Tsui?s body. Mr Chan told the jury clothes worn by the masked man during the Tsuen Wan robbery were similar to those worn by Tsui in a home video. However, it would be for the jury to consider whether this was sufficient evidence to indicate Tsui was the robber. The jury are expected to start deliberation after Mr Chan finished summing up the case on Tuesday. There were 116 witnesses, three overseas criminal experts, as well as 19 chemists and other experts giving evidence at the inquest. More than 250 exhibits were presented to court.