[1] On 25 April 2007, the five-person jury in the coroner's court unanimously decided that Tsui was responsible for injuring one and killing two fellow police officers and a bank security guard, on three separate occasions.

Assistant Police Commissioner John Lee said that this was "an exceptional case",[3] while Coroner Michael Chan Pik-kiu called it "the most difficult" inquest for a jury he had ever encountered.

[12] Tsui was a habitual heavy gambler and was known to have made a HK$75,000 wager on Japan to win the 2004 Asian Cup final at odds of 2.8:1 on 7 August 2004.

[14][15] At 12:05 on 14 March 2001, the Lei Muk Shue Police Station received a call regarding a noise complaint from a flat at Shek Wai Kok Estate.

[15] He was subsequently attacked, struggling with his assailant to prevent his revolver being snatched, but was shot five times at close range.

[6] Under police guard, paramedics wearing bulletproof vests rushed Leung to Yan Chai Hospital where he was declared deceased upon arrival.

His funeral in Hung Hom was attended by top officials including Chief Executive Tung Chee-hwa and Police Commissioner Tsang Yam-pui.

[21][22][23] Tsui fled the bank with HK$490,000 and US$1,000,[22] entering Cassie Hill Road and then into the Belvedere Garden shopping arcade before escaping through another exit.

[22] The police located several domestic helpers who witnessed the robber removing his balaclava following the robbery and produced a facial composite image of the suspect.

[24] The perpetrator was described as a man with short hair and about 1.8 m tall, whom Assistant Police Commissioner Yam described as a "calm, cold-blooded and brutal robber".

[22] It was later discovered that Tsui matched the description of the perpetrator as captured on closed-circuit television; key pieces of evidence were a red T-shirt, Mizuno brand shoes[6] and the fact that footage showed the killer to be a left-handed gunman.

[23] A red T-shirt carrying a similar distinctive logo as captured on CCTV was found at Tsui's home after his death.

The T-shirt, bearing the logo of the Yinchuan International Motor-cycle Travel Festival was a gift to Tsui by the club secretary during his visit to the show in 2000.

[22] A ceremony attended by his relatives, friends and bank chairman Vincent Cheng was held at the Kowloon Masjid and Islamic Centre on 7 December before his body was returned to Pakistan later in the day.

[28] It was reported that Tsui was active in foreign exchange market, commodities, securities, funds, and margin trading, and had lost a total of HK$371,982 in those investments.

[28] The police alleged that the transactions were inconsistent with a constable's salary and that the HK$500,000 in unexplained cash would be consistent with the amount stolen during the heist in 2001.

[29] On 17 March 2006, 28-year-old Constable Wilson Sin Ka-keung (Chinese: 冼家強) and 33-year-old Constable Tsang Kwok-hang (Chinese: 曾國恒) were ambushed by Tsui while on patrol in the pedestrian subway connecting Austin Road and Canton Road between the areas of Tsim Sha Tsui and Kwun Chung.

and was happily photographed when he won the chance to buy his flat in a draw and during the 1 July March in 2004 where he was dressed in traditional Chinese funeral style clothing ("披麻戴孝").

[4] A Federal Bureau of Investigation criminal profiler believed that Tsui's behaviour fit into most of the definitions of schizotypal personality disorder, while an expert from the Queensland University of Technology said Tsui's personality profile matched that of a serial killer who believed he was destined to change the world, attempting to rise above his self-perceived unremarkable life and playing God by taking lives.