TIS, you are referring to Pedrosa. Here's a walkthrough of the scene.

SPOILER
Vincent/Max walk in, Vincent tells him to walk 15 feet ahead and a little to the left or bystanders will die. Vincent goes to bodyguard #1, punches him, and stomps on his neck. Vincent goes to the second one, and kicks his knee in, and punches him twice in the upper body/face. Vincent grabs another guard, knees him in the ribs, and uses him as a human-shield for a while. As the FBI is aiming at Max thinking he is Vincent, another cop walks in and pins a criminal with a gun against the wall, the criminal fired a few shots, one of which hits Pedrosa in the leg, who falls and is dragged away. A bodyguard shoots a bystander, and then aims at Max. Vincent sees him and shoots him, and then shoots twice at two other men but misses. He looks at Max with an annoyed look on his face, and advances where he gets grabbed and loses his gun. He stabs the men and hits another as he drops to the floor and gets his gun, rolls over shooting another man or two. He then gets up and kills a few more, and finally shoots the witness once, and reloads to shoot again and leaves, where he shoots Fanning.
SPOILER END