But they did leave a crashed aircraft in the ground...
If it did crash vertically...plunging the plane 20+ feet into the earth, not much would of been left on the surface to see...and not much of a body to retrieve. I suspect they would of left it there, thinking it had been obliterated.
Considering that about 1/3 of the Allied air-crews were killed over Europe, I’m sure there were many Allied aircraft crash sites where no bodies were ever recovered. The Germans lost a much higher percentage of that...and I cannot imagine they carefully recovered all the human remains from obliterated wreck sites.