Erich Bauer, one of the commanders of Camp III, stated: "He was one of the most brutal members of the permanent staff in the camp. His whip was very loose." For instance, in spring 1943, when a worker prisoner tried to take his own life and was found dying, Frenzel shouted that Jews had no right to kill themselves — only Germans had the right to kill. Frenzel whipped the dying man and killed him with a bullet. Sobibor survivor Hershel Cuckierman described Frenzel as "a sadist and a killer without conscience. His involvement at Sobibor went much beyond the mass exterminations; he committed numerous other crimes as well."