I watched this case for a time as it concerned a retired auto worker not far from where I live.
The evidence was suspect right from the beginning, as it relied upon supposedly leaked documents from behind the iron curtain, with no way to verify their veracity. Even eyewitnesses who were incarcerated in the camp testified that he was not 'Ivan the Terrible', but he was ultimately found guilty of falsifying his past on US immigration papers and subsequently deported.
My interest waned, he was tried in Israel, found guilty, but subsequently had his conviction overturned. Was he a guard, I think so, but just a low level cog put to work by an occupying force. Not unusual at all, and I was quite surprised that he was put on trial yet again, but given the sensitivity of the alleged crimes, it this time found a judicial system in Germany where it is probably least likely that he would get a fair trial.
It is not because of the judicial system in Germany itself, but because of the nature of the charges and the political climate in determining otherwise. If the Israeli's let him go, that said something. It is kind if like Eliot Ness testifying that you are not guilty of bootlegging!
All this aside, he is dead, his family finally getting a rest from decades of battles, and the truth and/or justice of his life meted out on another plane, one of God or public discourse, depending upon your belief system.