Again, as I said in a few replies back to the identical point:
"What difference does that make? Chasing a deranged woman w/ a kid in the vehicle through rush hour traffic stands a greater chance of killing the kid regardless of where the kid was obtained from. Or the kid should be killed in case she was kidnapped?"
It could have been your daughter.
And cops responding the same way would have more than likely resulted in the same way, a dead kid no matter who's kid she was. Even were that the proper response, there were no reports of a kidnapping so what are the odds that the case wasn't exactly as it appeared, a crazy woman w/ a kid in a pickup? And what are the odds that the cop situation isn't exactly as it appears, a hot dog cop who gets off on lights and sirens so much that he lets it overide his commonsense (generously assuming he has any to overide).