Erich Wasicky ( May 27 , 1911 in Vienna , Austria & ndashl May 28 , 1947 in Landsberg ) was a pharmacist at the Mauthausen concentration camp . Erich Wasicky ( \* May 27 , 1911 in Vienna , Austria ; â May 28 , 1947 in Landsberg ) was a pharmacist at the Mauthausen concentration camp and in charge of the killing of large numbers of victims by gas according to Action T4 which corresponds to euthanasia .