An Oak Ridge man is set to be extradited to Germany after a federal immigration judge in Memphis said he served Nazi Germany as a concentration camp guard during World War II.

Federal officials say Friedrich Karl Berger, now 94 years old, served as an armed guard in a concentration camp near Meppen, Germany. Berger reportedly told the court he was ordered to stand watch over the prisoners during their workday and make sure they didn’t escape.

The US Department of Justice’s Human Rights and Special Prosecutions unit began investigating Berger in 2017.

The Memphis immigration judge in Berger’s two-day trial found the prisoners being guarded by Berger were subjected to barbaric conditions and forced into labor.

Berger is also accused of guarding a forced evacuation to the main camp that left 70 prisoners dead.

Berger said the court’s conclusions about his work at the camp were based on “lies.”

The Department of Justice did not say whether Berger will have the ability to appeal the ruling but the extradition will take place.