Continuity mistake: At the very end, as the S.W.A.T. truck pulls away and is driving through the desert after dropping off the prisoner, a call comes through the radio. Street puts his ear-piece on, the camera angle changes to Hondo who is right behind and replying to Street, and Street is again just beginning to put his ear-piece on.
Continuity mistake: When Gamble and TJ exit from the sewer, a member of the gang puts the lock on the gate between the bars on the door and the gate at an angle. When Street and Hondo arrive and try to shoot the lock off, it's on the latch holes and the lock is straight.
Answer: The SWAT Captain originally kicked Street and Gamble off the team and out of the SWAT Division completely for disobeying orders resulting in a hostage being shot. The SWAT Lieutenant convinced the Captain to keep the two officers in the division on a probationary basis to work back towards getting back on the team. Gamble was insulted by the probationary assignment and later resigned. The Captain offered Street the chance for immediate reinstatement to the team if he placed all blame on Gamble. When Street chose the probationary assignment over blaming Gamble or resigning alongside Gamble, everyone assumed Street cut some type of deal to remain in the SWAT Division without knowing the whole story.