Re: What did Dr. Pavel do after the plane crash?
I'm going to answer your questions although they're unbelievably terrible. They were taking blood from Pavel and putting it in the body so that when the CIA are examining the plane crash they'll find some of Pavel's dna. It might not fully trick them into thinking he's dead but it'll keep them off the trail for long enough. The manifest for the plane had one extra listed on it for one of the 3 hooded men. Thus one of the League of shadows had to stay behind and die. Again there probably were no bodies in the wreckage but there will be different blood types and enough for forensics to identify how many people were in the crash.