Dr Schultze is not deceased. He did not have a website back when he used to answer questions on here and he was promoted on here so I assume that is why he chose to use this site a while.
He left suddenly. He now has a website and he does take questions there but one is less likely to get answers there as it seems he sticks more with questions promoting products he wants to sell IMO.
I assume he is too busy to be at both site and do his other things he does. His website is herbdoc.com
His teacher was Dr John R Christopher who originated the incurables program and many of the protocols that Schulze uses that he intensified and played with the formulas a little.
Dr Christopher is diseased and his website is run by his heirs and the school of natural healing.
His son recently sent out an article talking about the harm Antibiotics do to people and said the acidophilus etc is not enough and gave a protocol for eliminating candida and leaky gut that you or other readers may find interesting.