Regarding your point 2.:
In Hannes Hller's EUROPEAN JEWISH MAGICIANS 1933 - 1945, Dsseldorf 1999,pp. 50 -51, Alfred Mihiel - Jac Olten is mentioned.
I quote: "... At the start of the war he is imprisoend in a Prisoner Of War Camp 'Stalag 13', from where he is released, by Helmut Schreiber, on November 13, 1940. Schreiber clothes him anew and obtains him apparatus and engagements...".
I think, as the exact dates are given, the story seems to be true.