With the end of Nazi Germany imminent, Günsche was tasked by Hitler on 30 April 1945 with ensuring the cremation of his body after his death. That afternoon, he stood guard outside the room in the "Führerbunker" where Hitler and Eva Braun committed suicide. After waiting a short time, Hitler's valet, Heinz Linge, opened the study door with Martin Bormann at his side. The two men entered the study with Günsche right behind them. Günsche then left the study and announced that Hitler was dead. Later, having ensured that the bodies were burnt using gasoline supplied by Hitler's chauffeur Erich Kempka, Günsche left the "Führerbunker" after midnight on 1 May. On 2 May 1945, Günsche was taken prisoner by Soviet Red Army troops that were encircling the city and flown to Moscow for sharp interrogation by the NKVD.