I wonder though, when cops find themselves outgunned like that, would they withdraw and call in the SWAT?
Or would they try to return fire and prevent the gunmen from spraying automatic gun fire unchallenged?
Maybe to try to minimize the threat to the public, they'd try to fight back as much as they can? Isn't that how so many cops got taken out in that shootout which inspired Heat?
I got the sense that Ani saw things getting out of control and felt compelled to stop the gunmen any way possible.
In the real world, if you heard that cops withdrew while civilians were getting mowed down, the PD would never hear the end of it.
The other thing is, they wanted to catch the perp alive for questioning but it soon became impossible and they had to try to put all of them down.
Of course one might argue that by continuing to return fire, that made the perps shoot with impunity. So if they let that van get away, maybe a lot less carnage overall.