Lethal Weapon 4

Officer Sean Thompson is a martial-arts expert and a cop. He and his partner are working to stop a gang of arms dealers and car thieves, but their efforts are complicated by his younger brother being a member of the gang.

Frank Martin puts the driving gloves on to deliver Valentina, the kidnapped daughter of a Ukrainian government official, from Marseilles to Odessa on the Black Sea. En route, he has to contend with thugs who want to intercept Valentina's safe delivery and not let his personal feelings get in the way of his dangerous objective.

Mason Storm, a 'go it alone' cop, is gunned down at home. The intruders kill his wife, and think they've killed both Mason and his son too. Mason is secretly taken to a hospital where he spends several years in a coma. His son meanwhile is growing up thinking his father is dead. When Mason wakes up, everyone is in danger - himself, his son, his best friend, his nurse - but most of all those who arranged for his death

A Chicago cop is caught in the middle of a gang war while his own comrades shun him because he wants to take an irresponsible cop down.