In the Line of Duty 4: Witness › Cast
Cynthia Khan
Insp. Yeung Lai-Ching
Donnie Yen
Officer Donny Yan
Michael Wong (actor)
Officer Michael Wong
Donnie Yen Ji-Dan
Lisa Chiao Chiao
Luk's mother
Yat Chor Yuen
Luk Wan-Ting
Liu Kai-chi
Ming
Blaine Lamoureux
Officer Peter Woods
Farid Dordar
Thug at pier
Chiao Chiao
Yuen Shun-yi
Drug trafficker
Ray Pichette
Violent policeman