John Demjanjuk was a Ukrainian-American who served as a Trawniki man and Nazi camp guard at Sobibor extermination camp, Majdanek, and Flossenbürg. Demjanjuk became the center of global media attention in the 1980s, when he was tried and convicted in Israel after being misidentified as "Ivan the Terrible", a notoriously cruel watchman at Treblinka extermination camp. In 1993 the verdict was overturned. Shortly before his death, he was tried and convicted in the Federal Republic of Germany as an accessory to the 28,060 murders that occurred during his service at Sobibor.

Feodor Fedorenko or Fyodor Federenko was a Soviet Nazi collaborator and war criminal who served at Treblinka extermination camp in German occupied Poland during World War II. As a former Soviet citizen admitted to the United States under a DPA visa (1949), Fedorenko became a naturalized U.S. citizen in 1970. His prior Nazi collaboration was discovered in 1977, leading to his denaturalization in 1981. Subsequently, he was deported to the USSR and sentenced to death for treason and participating in the Holocaust. Fedorenko was executed in 1987.