I believe him
Not about the Satoshi part, that's obviously rubbish. But I do believe that he and his partner shared keys and planned giving them to each other in the event of one or the other's death. I believe he was telling this story long before the court case even happened. It could be that the courier is tied to his partner's estate and legally binding but you'd think there'd be some documentation to back it up.
Either way, it's a great story to follow.