One time when I was in middle school, a criminal on the run was spotted across the street from the school. It was an on foot chase. Even though they didn't suspect the guy of carrying a weapon, they had the school do a lockdown. Good thing my classroom had windows, because we actually saw the guy running from about 3 policemen. It was the end of the school day, so there was a ton of cars waiting for the kids to come out and get picked up. The guy was running through all the cars, when the policemen split up, one guy staying behind him, and the other two running ahead up the sides of the car line.
Then, we saw him again, and BAM! the policeman on the left tackled right into him from the side, and took him out. It was pretty cool to watch.
A couple of my friends said they had squads with weapons coming across the soccer field by the time the guy was caught. They immediately dispersed, though.