Tsui was the elder of two children born in
Shaowu, Fujian, and arrived in
British Hong Kong in 1978 with his mother. His father and brother arrived a year later. He attended the Kwun Tong Government Secondary Technical School (now
Kwun Tong Kung Lok Government Secondary School). After graduation, he had several jobs, including a stint with the
Royal Hong Kong Regiment. Tsui joined the Royal Hong Kong Police in 1993; he regarded it as a well-paid job with good benefits, and was a police constable for 13 years until his death in 2006. He was an outstanding cadet at the Hong Kong Police College, having won the "silver whistle". Tsui was an excellent marksman, scoring full marks in target shooting and simulated bank robbery shooting in 1993. From 2001 to 2005, in the tests held three times a year, he scored a perfect 48 points. According to shooting range records, Tsui was a left-handed shooter but had also claimed that he was ambidextrous to a superior. From 1996 to 2001, Tsui made four attempts at the 'Police Constable/Senior Police Constable to Sergeant Promotion Qualifying Examination', He scored 68 marks in his 2000 attempt which earned him an interview, but his stubbornness and difficulty in communication meant that he was never promoted, In October 2001, Tsui and his wife appeared together in a couples version of
Who Wants to Be a Millionaire? on
ATV and won HK$60,000 and stated that they would donate some of the money to charity. Tsui was an avid sportsman and
Oxfam Trailwalker, and was known to participate in marathons and
paragliding. Unbeknownst to his wife, he would also frequent
massage parlours,
karaoke bars, and prostitutes in
Mong Kok and
Shenzhen. 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.
Murder of police constable In March 2001, Tsui murdered constable Leung Shing-yan () and stole his
revolver. His final radio call was received at 12:25 when he reported that he had arrived at the flat and nobody was responding to his knocks. Leung took three bullets in the head and two in the back at Flat 552, Shek To House Block B. Later,
forensic tests found that the
DNA on a mask left at the
crime scene matched Tsui's. Leung is survived by his parents and a younger brother and sister. In 2002, he was posthumously awarded the
Medal for Bravery (Silver) in recognition of his courage and "gallantry of an extremely high order". 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". A HK$2 million reward was issued. Immediately following the robbery the police noted that the murder weapon appeared to be a police service revolver. 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. An expert witness identified the T-shirt as having been worn inside-out during the robbery.
Forensic ballistics later identified the gun used in the robbery as the police service revolver taken from police officer Leung Shing-yan in 2001.
Financial irregularities An investigation by the Criminal Intelligence Bureau into Tsui's financial status from January 2000 to March 2006 revealed he had a total of 19 personal banking and investment accounts hidden from his wife, the total assets of which amounted to a total of HK$2,977,513. Seven personal and 12 investment accounts were opened under his name around mid-February in 2002 using a friend's address. Between February 2002 and October 2004, Tsui deposited HK$557,718 into the 19 accounts. All transactions were in cash. The revolver used by Tsui in the shootout was confirmed to be the service revolver taken from Leung and used in the heist in 2001. ==Mental state==