 Complete the following phrase:  In spring 1941, he was drafted again and assigned to Einsatzkommando 3, part of the Einsatzgruppe stationed in Bad Düben. In October 1941, he was assigned to work in the Office of the Commander of Security Police Sicherheitsdienst or SD and Security Police Sicherheitspolizei or Sipo in Vilnius, then part of the Reichskommissariat Ostland. Weiss held this position until July 1944. He was responsible for all aspects of the repression against the Jewish population of Vilnius, which is estimated to have been around 50,000 during the Holocaust. Despite his low rank of technical sergeant SS-Hauptscharführer, he was in charge of the Vilna Ghetto and nearby Lukiškės Prison, as well as commanded the Ypatingasis būrys killing squad responsible for the 