A Witness out of the Blue (Fanzui xianchang)

synopsis

Detective Frank Lam (Louis Cheung) arrives at the scene with his commanding officer Yip Sir (Philip Keung) to find a dead man inside an apartment with a strange noise "Help! Help!" next to its body. Yip Sir is convinced the deceased is killed by his partner in crime, Sunny Wong (Louis Koo) when they had a fight over how to divvy up the loot from an armed robbery a month ago. When confronted by Frank, Sunny denies all allegations and names Yip Sir as the killer. Frank's only hope in cracking the case lies in sole survivor and eye witness at the crime scene - a parrot!