It depends on the school. I personally have only seen police at the school where I taught when the DARE officer comes to give talks about drugs and the one time they did a drug search after two sophomores were obviously high during ELA class.
I teach high school math and a freshman girl wears a neon green "Gooner" shirt to class. I think she gets away with it as idgaf and the rest of the teachers don't know what that means.
Sounds like your son has a better grip on math and science than most of the best high school students in my parish. 😅 I teach at the best school in my district and students still can not perform basic calculations.