Krebsbach was transferred to the Kaiserwald concentration camp in Latvia during the autumn of 1943, as it is believed he shot Josef Breitenfellner in his home. Breitenfellner was a German soldier from Langenstein on vacation when he and his friends awoke Krebsbach from his sleep on 22 May 1943.[1] Here he conducted selections by forcing the prisoners to perform physical exercises to check their strength and then identifying the two thousand weakest to be killed.[2]