SPOILERS! Detective Morton in the end.
Maybe I'm missing something here, but when Morton is having the conversation with Warwick about the Polaroid, Warwick just brushes it off as a very resourceful photo manipulation from John, despite all the evidence suggesting it would have been a very difficult and near impossible fake polaroid to create. Then Warwick casually suggests that he and Morton have dinner while Morton investigates his home.
Is Morton seriously that stupid to just drop protocol over a delightful dinner with a potential criminal involved in a bank heist just because he said a Polaroid like that is just plain silly?
I definitely enjoyed the movie and got a few chuckles out of it, but that ending just didn't sit right with me.