I know the middle school cameras were checked for sure, but not sure about high school. I would assume the high school cameras were checked too, but don't know for sure.
I'm not even sure if the cameras back then were good enough to check cars that drove by. Don't think license plate readers were a thing. Cameras back then were probably grainier. Plus a lot less places/homes had cameras compared to now, so doing any sort of vehicle tracking would be difficult, if not impossible.
It helps just knowing the middle school cameras were checked.
That narrows down the length as is because though his destination was the high school, he "could" have made it to the middle school. So that "should" conclude that he didn't.
Though as you said, old cameras can be extremely grainy. Most things are just like blobs moving around and you have to be an expert to make sense of any of it.
Anyway, that cuts it down a tiny bit.
We're at random houses and intersections. To LJ park, and his direct corner.