Unless the cop invents a new pretext to harass him. Maybe he thinks he saw drug paraphernalia in the car. Maybe he thinks Stephen was resisting. Maybe he puts his knee on Stephen's neck and holds it there for 7, 8, 9 minutes.

I winced when I read "Stephen did everything he was told" because that led to the police stealing his money. But what else can he do? The cop has the power to kill him and very likely get away with it. And it happens with enough frequency to be a real threat.