Any cop will tell you that they can come up with a "valid" pretext to make a traffic stop, after following a vehicle for a short time. The officer knows that t

Any cop will tell you that they can come up with a "valid" pretext to make a traffic stop, after following a vehicle for a short time. The officer knows that their subjective claims will be treated as factual by the courts. So, yeah, a bigoted cop can pull over minorities and trivially manufacture some rational reason that will justify their actions. There's always a "reason".