Is there way for cop to know he has tint permit without stopping him........
Does the cop have the right to presume him guilty of tinting without a permit? I suspect Pennsylvania law says no, which is why he made up that bullshit about the headlights. People here know I don't jump at the chance to blame cops, but in this case he was probably wrong. It doesn't make America a police state, but it's an example of benign abuses Americans go through everyday.
Yes the cop can stop him for that. The court set standard for a lawful stop is only "reasonable suspicion". Not absolute guilt or even probable cause.
So...if tint that dark requires a special permit, the cop can have a rreasonable suspicion that it might be illegal tint. So he stops him and..its legal because of the permit. I will say...the permit should be a sticker that is displayed on the license tag though. It would be much easier.