Do you know who murdered his blood cousin? What if it was an accident that was caused by Quavo himself? How does that serve anybody, when nikkas start shooting at each other this is what can happen and he himself would probably bare responsibility for allowing the situation to happen, him seeing another breh locked up who he thought was acting in good faith doesn’t do anything for his family, it doesn’t pay the funeral bills, it doesn’t bring his cousin back, so you should allow him to make whatever decision he feels is right as a man without placing judgement.
Neither you or I was there and know the situation or what happened and in the end it’s Quavo himself who’s going to carry the load for his loss in the family, not you nor I. If he don’t want to cooperate with some racist police that’s his own prerogative.