Volksdeutscher (de: ethnic German) identifying a Pole - an alleged participant in the events of so-called "Blody Sunday in Bydgoszcz" (de: "Bromberger Blutsonntag"). In the first days of September 1939 Poles denounced in such way were usually shot on the spot. This photo was taken in the artillery barracks at 147 Gdańska Street in Bydgoszcz.