Johann Breyer (May 30, 1925 – July 22, 2014) was a retired tool and die maker who the Office of Special Investigations (OSI) unsuccessfully attempted to denaturalize and deport for his teenage service in the SS.
His was considered the "most arcane and convoluted litigation in OSI history." In 2013 Germany issued an arrest warrant accusing him of aiding in killing 216,000 Jews as a guard at Auschwitz.
He was arrested at his home in Philadelphia on June 17, 2014, age 89, and held without bail pending an extradition hearing.
His health rapidly deteriorated while in custody and he died on July 22 prior to his hearing.