Yeah, i'm not saying there isn't something going on there, but centering on the school because "people who got it went there" seems silly. Those people also probably spent considerable time at other places in the immediate area. The places we regularly hung out and goofed around with in HS were the same places people had done the same at for decades.

If the numbers are that out of wack compared to the general pop and you ruled out the low hanging fruit in the school, its time to look at other places, or admit its just a statistical anomaly, not keep doubling down on the easy answer.