How does it not make sense his uncle or whoever it was that hit him put this thing on his mind that you can't make excuse for your actions and you can't explain your actions or it is an excuse and you will be punished and I will not believe you excuse that is the whole situation that is going on right now he feels that he can't explain why he took the money because it is an excuse. His reactions and him not telling Dustin the truth are valid and do make sense because trauma appears in different way and times.