I'm not overly familiar with the Scarecrow, so I can't judge how in character this is. But it was definately fairly well written. I would remove or alter that 'aka Scarecrow' at the beginning, it's clumsy and looks amateurish. Also, I'm certain something could be done with the climax there, as Scarecrow turns the light on, to emphasive the profound impact. The way it was written felt kinda distant, like looking at it from the perspective of a forensic scientist investigating the scene later or something.
However, despite that, I definately did enjoy this piece. An excellent short story.