After the initial attack, the windshield of the Chevy is not cracked. After Hooker jumps on the hood, it is shattered. Hooker did not hit the windshield hard enough to shatter the windshield. Had he done so, he would have been injured.
After the Dodge Dart goes under the trailer, the roof pillars are cleanly cut, revealing a power saw had been used to remove it.
Hooker sends 4 patrol officers including himself to a camp where there had been over 10 men with rifles. In reality, a SWAT team would be used in a scenario like that.
In the final pursuit, Hooker and Corrigan are in the unmarked blue sedan and Hooker uses his radio designation of 4 Adam 30. Since he was in the unmarked car, he would have used 4 X-ray 30.