Sometimes we watch Live PD. The police will pull someone over for some minor shit.
The license plate is improperly mounted.
One of the tires touched the center line (improper lane usage)
They failed to use their turn single the correct distance before executing a turn.
As the officer approaches the car, he smells cannabis. The driver is inevitably black, Latino, or a semiliterate white.
The overpowering odor of cannabis enables them to use to use a canine unit. If the dog somethingorothers; they can then search the car.
I am pretty sure they don't pull over every single car with a crooked plate or whose wheel barely touches the center line or used the turn signal technically wrong. I bet there is some sort of selective law enforcement going on.