Let sleeping dogs lie would be my thoughts on that one..... I'm unclear why we need proof from a decomposing body, he's dead. End of. As you say, it should get interesting, hopefully it will not endanger the lives of our people around the world by stirring up even more trouble.
I stand by my original thought re: what to do with him...modified just slightly by his current 'resting place'. Open the bag the puke was deep-sixed in, dump pig guts in with him, zip it back up, and replant him smack in the center of the biggest hog farm in this country.
As the terrorist organisation he (Bin Boy) represented has announced a new leader - which is tantamount to acknowledging BB's death - I can see little point in diving to recover the bits. As above, he's got another 12 minutes to enjoy.