If you intentionally do something wrong (negligent, reckless, illegal) while disregarding the possible repercussions, is that still an accident even though the specific outcome was unintentional? I don't think so. An accident is unintentional and determined by chance.
We all know better than to pull that stunt at a traffic light. We know why. No doubt, so did that cop yet he deliberately, intentionally pulled out into the through lane. His wrong action was intentional, the resulting event is one reason why it's wrong. Misbehavior, not an accident.