 Igo Sym's collaboration with the Germans contrasts with the conduct of his younger brother Ernest who, during his official activities as a chemist, clandestinely produced explosives for Poland's Home Army.In early 1941, the headquarters of the underground Polish resistance group Union of Armed Struggle (ZWZ) decided to liquidate the collaborator.Sym's behavior was loudly trumpeted by the Nazis, and his assassination would show the Poles that the underground movement was active, always ready to punish all traitors.