Lethal Weapon 3

Lethal Weaponis a 1992 American buddy cop action comedy film directed and produced by Richard Donner, and starring Mel Gibson, Danny Glover, Joe Pesci, Rene Russo and Stuart Wilson. It is the third film in the Lethal Weapon series.

L.A.P.D. Sergeants Martin Riggs Gibson and Roger Murtaugh Glover arrive at an evacuated building believed to have a bomb in it. Against orders, they go inside to investigate the bomb. Riggs decides to deactivate the bomb himself instead of waiting for the Bomb Squad to arrive. Unfortunately, he causes the bomb to detonate and the whole building to collapse. This causes them to be demoted to uniform duties, which upsets Murtaugh because he only has seven days until retirement. While on street patrol, the two thwart a robbery using a duplicate armored car, although they only manage to catch one of the two wouldbe thieves. During the arrest, it is discovered the criminals were armed with a new type of armorpiercing bullet, informally referred to as cop killers. For their efforts in stopping the raid, Riggs and Murtaugh are reinstated as Detective Sergeants by their superior, Captain Murphy Kahan. Murphy introduces internal affairs Sergeant Lorna Cole Russo to the two detectives and informs them that the suspect they have in custody from the raid is a known associate of former L.A.P.D. Lieutenant and suspected arms dealer Jack Travis Wilson.In the meantime, the other criminal who escaped is brought before Travis who is conducting a business meeting with mobster Tyrone Millar to account for his actions which have led to police heat being focused on Travis arms business. Travis has his henchman who was one of the robbers who tried to carjack that armored cars, throw the thief into a pit and has it filled with cement so as to display to Tyrone what happens to anyone who might doublecross him. Travis then goes to the county lockup, using his still valid police badge, gains access to the other raider, and executes him. Travis is unaware that he has committed this execution on camera, and when Cole and Riggs arrive on the scene, they are able to identify him using the footage. ........

Source: Wikipedia