Boys being boys with gasoline, it sounds like. I remember I regrew my eyebrows once. My dad caught their garage afire when he was a kid. This was a bad one - backflash, can on fire, flaming hot can got quickly tossed, hit another boy.
Why is one being charged with arson if it was boys being boys? First the cops say it was an unintended accident and the next a kid is indicted. I think we need more info on this story.