Washington ( CNN ) -- A 90-year-old Michigan man who officials say rounded up and shot Jews in Nazi death camps during World War II is a step closer to being deported , the Justice Department announced Tuesday . In January , a judge found John Kalymon of Troy , Michigan , to have been an armed member of the Nazi-sponsored Ukrainian Auxiliary Police from 1941 to 1944 . Tuesday , an appeals board dismissed Kalymon 's attempt to block his deportation from the United States . Kalymon immigrated to America from Germany in 1949 and became a U.S. citizen in 1955 . A federal judge in Detroit revoked his U.S. citizenship in 2007 . `` John Kalymon and his Ukrainian Police accomplices were indispensable participants in Nazi Germany 's campaign to exterminate the Jews of Europe during World War II , '' said Assistant Attorney General Lanny Breuer . Breuer said tens of thousands of Jewish men , women and children were murdered in L'viv or rounded up and shipped to the Nazi death camp in Belzec or to Nazi forced labor camps . In a news release last month , the Justice Department said Kalymon `` personally shot Jews while serving , killing at least one '' and `` participated in violent anti-Jewish operations in which Jews were forcibly deported to be murdered in gas chambers and to serve as slave laborers . '' `` This case is one of more than a hundred cases successfully prosecuted by the Department of Justice against wartime Nazi perpetrators , '' said Eli Rosenbaum , head of the Justice Department 's Nazi-hunting unit . Rosenbaum said that since the government launched its program to find and deport former Nazis in 1979 , 107 individuals have been prosecuted , and 180 suspected Axis persecutors who attempted to enter the United States have been blocked from doing so . Although authorities believe only a small number of former Nazis -- mostly in their 90s -- remain alive in the United States , the government is determined to keep up the hunt and deport those they find . Rosenbaum said the program `` reflects the government 's continuing commitment to pursuing justice on behalf of the victims of the Holocaust and other human rights crimes . ''
Lanny Breuer was a member of a Nazis -backed police unit , a court has found . He came to the United States from the United States in 1955 and became a Germany citizen in 1955 . Efforts continue to find the few former Nazis remaining in the United States .