I find it a little weird that not as many people are suggesting that he could have been the shooter as some of the other options.

He wasn’t in school, so he had the time to plan and be at the school to burn the cars.

He had plenty of reasons to be mad at the administrators, especially Gamby. (Maybe both cars because he wasn’t sure which was which... I haven’t gone back to see if their names are on the spots).

There’s a good bit of focus on the gloves, which kinda fit with working at a meat packing plant.

And from a TV show perspective, he’s served as a redemption device for Gamby, but why else is he there? They may have introduced him simply because he did it. Showing that Gamby is coming around is cool, but they could have done that with all the prior characters, and to some extent, they have.