I think that Steve is guilty because of all the clues that he is leaving for us. When he started talking about being in the store and trying to keep him mind a blank screen, i thought well if he is trying to make it a blank screen he wants to block it out of his head and forget about it. But at the same time I think he feels bad about Mr. Nesbitt. When steve was holding the basketball and dropped it then ran away I think that he is guilty of being the lookout and signaling them. Therefore he is guilty.