A new Netflix docuseries centers on the story of a retired Ukrainian-American autoworker in Cleveland who was accused of being “Ivan the Terrible,” one of the Holocaust’s most notorious SS guards.

In the 1980s, a group of Holocaust survivors claimed that John Demjanjuk, a family man and respected member of his community, had allegedly tortured and killed nearly 1 million Jewish prisoners as a Nazi death-camp guard in the Treblinka extermination camp during World War II. While he did serve as a guard, it remained questionable as to whether he was that guard.

He was arrested and extradited to Israel, where he stood trial for crimes against humanity.

He died at a senior home in Germany on March 17, 2012 at the age of 91.

The trailer was released on Wednesday. Its five episodes hit Netflix on Nov. 4.