Is this an undercover cop?

Lately every time I get out of school (I'm a senior in high school) I always see this black Ford with their windows tinted in a way i can still see this man inside barely he always has shades on. I always see him when I'm waiting for the bus and whenever I see him he slows down by me and then just parks there and I notice him just taking notes but he looks at me and I felt like I was doing something wrong. I'm not a criminal well I once stole from this store over a year ago but that's about it I don't have a reason why someone would be watching me? Can anyone help me? I feel like the next time I see him I should go up to him and just ask who is he and why does he keep observing me.

Look at his license plates. In most states you can identify police vehicles by their license plates.

Call 911, tell them make/model/approximate year of the vehicle. Ask them to look into it…

Or you could rob a business/house when he's parked there and see if he comes after you.

Does your school have on duty school Police? They are the ones to report the vehicle to