4th November 2026 – (Hong Kong) A Government Laboratory DNA expert told the High Court yesterday afternoon that genetic material recovered from the handle of a hammer seized in the Abby Choi Tin-fung case matched Alex Kwong Kong-chi and could not be attributed to the other two defendants.
The murder trial, HCCC 198/2025, continues against former brother-in-law Anthony Kwong Kong-kit, 35, a driver; former father-in-law Kwong Kau, 69, retired; and former husband Alex Kwong Kong-chi, 32, who is unemployed. They are each charged with murdering Ms Choi in Hong Kong on 21st February 2023 and with preventing the lawful burial of her body between the 21st and 23rd of that month. The judge has told the jury that all three deny murder but have each admitted the burial offence.
Dr Wai Wing-kong, chief chemist in the Criminalistics and Quality Management Group, said he attended the Lung Mei Village unit in February 2023 to help locate forensic material and advise officers on what to seize for testing at the Government Laboratory. Among tools recovered at the premises was a hammer. Analysis of DNA on its handle, he said, produced a single-source profile that fully matched Mr Alex Kwong’s genetic profile. He inferred that the handle DNA could have come from him.
The random match probability, he told the court, was one in 6.2 billion — meaning the chance that a randomly chosen person who was not Mr Alex Kwong would share the same profile was one in 6.2 billion. He described that likelihood as “really very, very low”. Asked whether leaving such DNA would involve using and gripping the handle, he agreed. Successful transfer, he explained, required some force in the grip or friction, and contact over a period of time; a light touch alone would not move DNA onto the surface.
Dr Wai added that the handle DNA was from a single source. Comparisons with the profiles of Anthony Kwong and Kwong Kau allowed him to exclude those two men as the source of the genetic material on the hammer. Police had seized multiple tools from the Lung Mei unit, including the hammer now before the jury as a DNA exhibit. The murder counts remain contested; today’s evidence went to whose skin cells could account for a solitary profile on that handle, and to how much contact would be needed to leave it there.
