Still don't think I'm buying it. Why was only the interior torched? All the body panels are still silver, the tires are intact, and the plastic bumpers aren't melted. So the sports authority's story doesn't seem to jive - almost like it's an excuse to portray the stadium and it's fans as not being hostile toward visiting teams' fans.
If you ask me, it looks like some poor sport lit the convertible top of the car on fire toward the end of/after the game and it was put out, then these guys come along later on and beat the crap out of it.