i think that no one really "picked through" the debris, and that the body was just scooped by a bulldozer into a dump truck and dumped into the landfill, if anyone noticed it they probably thought it was a mass of twisted metal from the vault door
That's a plot hole I can dismiss even though it's debatable. I worked in the demolition/excavation field and I can assure you rubble are separated (metal/concrete/rock etc.), so I guess an endoskeleton wouldn't be unnoticed
