Linnas, a concentration camp chief who settled on Long Island and worked as a land surveyor, was one of the highest-ranking Nazi collaborators expelled from the U.S.
Linnas was stripped of his citizenship in 1982 and sent to the Soviet Union in 1987, where he had been convicted in absentia three decades earlier on charges he had a hand in the deaths of 12,000 people at the Tartu concentration camp in Nazi-occupied Estonia.
Linnas died of heart failure at age 67 before he could face a firing squad.
Investigators said Linnas ordered guards to fire on prisoners as they kneeled along the edge of a ditch, causing them to fall directly into their graves.
Immigrating to the U.S. in 1951, Linnas claimed to be a person displaced by the war and failed to disclose his Nazi service. He gained citizenship in 1959.