PREDATOR 2 thought......

PREDATOR 2 is on tv, and I suddenly just thought; by the end of the movie the government likely has in their possession a Predator; spear, mask, damaged shoulder cannon, and severed arm complete with part of a computer/self-destruct gauntlet. And NOBODY has ever touched on this? Not in any of the comics? Not in any of the games? Not in any other movies? REALLY?