Lethal Weapon 4
Shane Black, Jonathan Lemkin, Alfred Gough, Miles Millar 1998
IMDB: http://www.imdb.com/title/tt0122151/
With personal crises and age weighing in on them, LAPD officers Riggs and Murtaugh must contend with deadly Chinese triads that are trying to free their former leaders out of prison and onto American soil.