I think it's fair to say that you win this one, although the name may be incorrect, as it is from memorey and the only other account has no name. In April 1942 (10 months after the invasion) a Soviet Jew was ordered out of a work party by a German officer and told to go down into a tunnel dug in the Brest Fortress. The emaciated soldier he found was indeed practically blind from living underground, and barely able to stand. He refused all food and water from the Germans and died shortly after his 'surrender'. Excellent books on the subject include Sergei Smirnov's Heroes of Brest Fortress and Albert Axell's 'Russia's Heroes'.