Krupa, the former pupil of Polish painter Józef Mehoffer in Kraków (finished his study in 1937), appears in archives of the International Tracing Service as the registered victims of Nazi persecution.

He was a forced laborer deported to Germany, while his sister Hilgard Marie was burned alive at the furnace of the Auschwitz K.C.

[2] Alfred Krupa's ancestry include persons of German, Polish and Jewish origin (multiethnic Silesian family).

In 1943 he has found himself in Croatia, Yugoslavia, joined resistance forces, and became one of the 13 core artists of the Art of Croatian Antifascist Movement (he exhibited at the historic first Partisan exhibition held in Topusko in 1944 on the free territory of Yugoslavia) In 1945 Alfred Krupa enrolled the Academy of Fine Arts in Zagreb (University of Zagreb) in order to formally defend and verify his academic level obtained at the academy in Kraków in 1937.

[4] In the summer of 1950 at Vrbnik, he hand-made a dive mask from truck tires and glass, a tube for breathing underwater, and tied himself and a painting stand to the sea bottom.