But they have to establish reasonable suspicion, wuch they also have to justify in court in order to investigate you further. They can't just say "he had a bad

But they have to establish reasonable suspicion, wuch they also have to justify in court in order to investigate you further. They can't just say "he had a bad score, so I pulled him over and found weed". If they did that, the stop would be unjustified and the whole case would be thrown out.