i understand there have been protests in grand rapids tonight. what are people saying? ? reporter: we ve seen protests throughout the evening. things doctor v calmed down now, but earlier there were hundreds marching and demonstrating in downtown grand rapids outside a very barricaded police department chanting justice for patrick lyoya. familiar calls, different case. now, there s still an ongoing investigation, of course, to determine whether this officer s actions were justified or whether he crossed a line. but the attorney for the lyoya family, ben crump, is already calling this use of force unnecessary and excessive and joins a chorus of people calling not only for the firing of this officer, but also the arrest and prosecution of this officer as well, don. listen, omar, we ve covered so many of these incidents at this network. a man is dead over a car registration. the whole thing happened in just two minutes and 40 seconds. but this isn t really cut and dry. reporter: