Since we all love hypotheticals, what if the ATV flips over the cop car, barrel rolls down the road (because of the high rate of speed and pure momentum at that speed) and kills the all the babies at the roads edge? Who's fault is that?
Chances are, if the ATV's path of travel wasn't interrupted, he would have just driven right by everyone, and no one would have gotten hurt. The cop could have pursued, with lights and sirens blasting, pulled him over, impounded the ATV, and gave the perp a summons. But instead, someone factually, almost died because of the cop.
The ATV guy was completely wrong. But what was the crime? A felony? Violent felony? Misdemeanor? Or a fineable offense? How many times have you been pulled over for speeding? Should a cop have tried to kill you by putting you into a ditch at 75mph? After all, you are jeopardizing everyones safety around you, no?
Stop being such badge lickers....