well here we go this is stright from erich hartmann himself:
The Final Interview with Erich Hartmann
Q:        How did you end up in Soviet custody?
 
A:         On 8 May 1945 I took off at around 0800 hours from my field in Czechoslo-
vakia going to Bruenn. My wingman and I saw eight Yaks below us. I shot one 
down and that was my last victory. I decided not to attack the others once I 
saw that there were twelve Mustangs on the scene above me. My wingman 
and I headed for the deck where the smoke of the bombing could hide us. We 
pulled through the smoke and saw once again the two allies fighting each 
other above us. Incredible! Well we landed at the field and were told that the 
war was over.I must say that during the war I never disobeyed an order, but 
when General Seidemann ordered me and Graf to fly to the British sector and 
surrender to avoid the Russians, with the rest of the wing to surrender to the 
Soviets.  I could not leave my men. That would have been bad leadership. 
There was a large bounty on my head, much like Ruedel.
now if you read carefully then you can tell what I mean by this may have been a bogus kill he said as soon as he landed the guy told him that the war was over that is why I think that his kill is not real