What likely happened is the cop who patrols this area of town on a daily basis probably knows this guy and had run ins within the past, he was looking for reason to stop him.
The area of town this happened in is not the best to say the least.
Come to find out, the driver was driving on a suspended license, had a knife on the driver’s side floorboard and had a significant amount of marijuana in his possession.
Granted the reason for the traffic stop was BS, it turned out much more was wrong with the driver than a BS traffic offense.
But you can’t pull someone over on a hunch. It is not a police state. If he knew the driver was driving suspended, ok but he made up a BS reason and everything after that is fruit of the poisonous tree.