Factual error: While talking with the gang leader alone, Bradford declares, "I'm never alone," and suddenly a swarm of officers descend on them, and a helicopter appears directly overhead. The helicopter makes no noise until the spotlight is turned on. A helicopter makes deafening noise and can be heard from miles away. There's no way you could be surprised by one being directly above you.
Factual error: During the LAPD gun exchange program, an explosion happens from (according to the show) claymore mines being in the trunk of a car. In reality, this wouldn't happen as Claymore Mines are very stable and safe. The explosive used, C-4, is shock stable and temperature stable. The mine will only go off when used with a detonator.