Using a new online resource provided by the German newspaper Die Zeit, Christian Rainer quickly confirmed suspicions that his grandfather was a member of the Nazi Party.

<img alt="Old, black and white photograph of a mustachioed man in a suit" height="349" src="https://i.cbc.ca/ais/8f3ad4f3-b19a-48c8-ac43-441590d88e83,1776976476301/full/max/0/default.jpg?im=Crop%2Crect%3D%280%2C714%2C3024%2C1701%29%3BResize%3D%28620%29" title="Austria&apos;s Christian Rainer used a new online tool to discover that his grandfather, Franz Rainer (1886-1961), was a card-carrying member of the Nazi Party." width="620" /><p>Thanks to a new online tool from the German newspaper Die Ze...