Dr Polak Kracowski was a well known pharmacist in Bialystok.

From everywhere Germans had driven the Jews in the direction of the Great Synagogue, with about eight hundred inside, they set fire to the building. Those who managed to escape from the burning building were shot. Those who resisted being pushed inside were shot.

Until late that day Jews were driven into the burning building, shot on the streets and in their houses.

Among those who died in the burning Synagogue was Dr Kracowski.

Source

The Holocaust - Martin Gilbert, page 161