香港警員否認在蔡天鳳謀殺案中不當處理DNA樣本

英文原標題：Hong Kong police officer denies mishandling DNA samples in Abby Choi murder case

英文原摘要：A police officer has denied failing to properly label DNA samples taken from slain Hong Kong socialite Abby Choi Tin-fung’s ex-husband after his arrest more than three years ago. Testifying in the High Court on Thursday, Sergeant Lam Chun also denied using excessive force to subdue Alex Kwong Kong-c