Erwin König Was a sniper supposedly killed by Vasily Zaytsev in the Battle of Stalingrad. The diary of Vasily Zaytsev mentions killing Erwin Konig, and there is a sniper scope in Russia, but there is no record of Erwin in Germany.
Now the conspiracy theory: (from Erwin Konig's wiki page)
Since the German Army has no record of a Maj. Erwin König it is possible that the German Army destroyed any record of König after learning of his possible death at the hands of Zaytsev. The defeat of the German forces by the Soviet forces in the Battle of Stalingrad was a major blow to German morale and according to many historians, was the beginning of the end of the Third Reich. This explains one possible motive for the German military to destroy records of König, as König's death at the hands of a "sub-human" Russian Communist would add to the humiliating defeat of the German forces at Stalingrad....
At the Central Armed Forces Museum in Moscow there is a rifle scope that supposedly belonged to a Wehrmacht sniper called Erwin König. In a post-war visit to Berlin, Zaytsev was allegedly confronted by a woman who told him she was König's daughter, with Soviet authorities quickly evacuating Zaytsev to avoid any confrontation.
Oh the other hand, Soviet propaganda was rife with fictitious stories to boost morale during a time when the war was so uncertain.