Have Scotty's parents been keeping up with Scotty though? Because the last time Scotty was home, Gabriel came over and was rather harsh to them before taking Scotty away. If they're looking at Scotty's friends, his parents might remember Gabe. It's not common knowledge about his pyro tendencies in Ohio, no, but Gabe would have had a bit of motive.
Also, if Sebastian hears about it, he'll pay Scotty's bail too.
But damn it, Harris is going to owe him BIG for this.