Deliberate mistake: A lot of the supposed handheld footage from bystanders on the scene couldn't have been filmed as such. People are on the ground, but the handheld footage is close to the action, as if the bystander is right there next to the action. This is a common mistake in a lot of movies.
Deliberate mistake: When the procession gets ambushed in the street by the guy with the automatic weapon, he shoots at the police cars. There are no drivers in the cars.
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.