Walter Schellenberg
While at Berlin Gestapo Headquarters, Müller put Elser into a workshop and ordered him to reconstruct the explosive device he used at the Bürgerbräukeller. When Reinhard Heydrich and Walter Schellenberg visited Elser in the workshop, Schellenberg noted, "He [Elser] responded to questioning only with reluctance but opened up when he was praised for his craftsmanship. Then he would comment on his reconstructed model in detail and with great enthusiasm."