I don't think we know where the money actually came from. The story that JW witnessed it being withdrawn was a lie. There is something about the money he felt he had to obscure. I believe that he lied because he thought SS was still alive and didn't want to get in trouble. I go back and forth about whether DW acted alone. On the one hand, I don't see him connected to anyone at AIW and I don't see any evidence thats been released implicating anyone else. On the other hand, I get stuck on the removal of the DVR. Even if he somehow got SS to reveal where the DVR was, knowing to ask seems like inside information to me.