In his final argument in Demjanjuk's trial in Munich, Hans-Joachim Lutz said he has proved with "no reasonable doubt" that the retired autoworker from the Cleveland area was an active participant in the Holocaust, the BBC reported. He described Demjanjuk, born in Ukraine, as one of the Trawniki, Soviet prisoners of war who were recruited for the death camps.
The court is expected to render its verdict in May. An estimated 250,000 people, mostly Jews and Soviet prisoners, were killed at Sobibor in eastern Poland.
Demjanjuk was convicted in Israel of being "Ivan the Terrible," a notorious guard at Treblinka. He spent eight years in prison there before the Israeli Supreme Court overturned the conviction.
Lutz said Demjanjuk should be spared the 15-year sentence set for death camp guards because of his time as a prisoner in Israel.
Demjanjuk said anything he did for the Nazis during World War II he was forced into.
U.S. authorities have revoked Demjanjuk's citizenship. He was extradited to Germany in 2009.