Well, that's the basic silliness about the Rosswell story: The wreckage. The claim is that there was a heap of wreckage and some (alien) corpses, and that the military came and picked it all up and took it to some secret place.
What is wrong with that scenario?
Well, I don't know how big and rugged an interstellar spaceship has to be, but I am sure we can safely assume that one with a crew of several people would not be smaller or more flimsy than, say, a twin engined aircraft, like a learjet. That means that we have about 10 tons of metal (or whatever it is made of) coming down.
Now, a flying craft can crash in different ways; it can make something that could be termed as a very poor landing (a good landing being defined as one you can walk away from), or, at the other end of the scale, it can auger in at high speed and disintegrate totally, leaving a surprisingly big crater and (10 tons of) widely scattered debris. Most crashes are something in between.
Have you ever seen a crash site or pictures from one? Let me tell you that even normal aircraft are much more rugged than living bodies. So, when the aircraft is more or less disintegrated, what do you think the bodies look like

?
Since the alien bodies are claimed to have been recovered with only relatively minor injuries from the Rosswell site (the one shown in the autopsy film just seemed to have a leg wound), we must conclude that the craft must also have been reasonably intact. So we have a 10-ton hull, possibly well battered, but largely in one piece. Now, first of all, that is not what the reports say, and secondly, that is not something you just haul onto a truck and drive away with, in rough terrain; it requires heavy lifting gear (and at that time they didn't have the nifty mobile cranes we see everywhere now), and a big flat-bed truck, probably a belted vehicle in the roadless terrain at the Rosswell site.
Or, we can go with the report that the craft was a heap of debris. So, it was disintegrated by the crash. Fine with that, but then the bodies would have been something you picked up with tweezers and carried away in moisture-tight bags.
Logically, the story falls apart, right from the start

.
Hans