Riggs and Murtaugh pursue Ku to a pier where they engage him in a brutal fistfight .
Ku attempts to escape with his brother , but his brother is shot and killed by Murtaugh .
Riggs and Murtaugh pursue Ku to a pier where they engage Murtaugh in a brutal fistfight .
Ku attempts to escape with his brother , but his brother is shot and killed by Murtaugh .