IF the cop is responding to a call and traveling above the speed limit, then it should be a "lights and sirens". Traveling from Wilmington to Calabash on 17 a couple of weeks ago just after the sun set, I was passed at two completely different points by Highway patrol cars, both doing at least 90 mph, weaving in and out of traffic WITH NO LIGHTS ON. One even blew through a red light with traffic coming by slowing a little bit and flashing his lights briefly. Luckily, no accidents occurred, but this type of behavior is an accident waiting to happen and a preventable one. HOPEFULLY this is not the case this time. But obviously if it is not a "lights and sirens" call, then they should not be speeding. And if they kill someone because they are speeding without lights and sirens, then that is manslaughter and should be punished, just like anyone. Being a cop does not place them above the law.
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