Until Thursday, Ukrainian immigrant Michael Karkoc lived in near anonymity in a tidy bungalow shaded by locust trees in northeast Minneapolis.
By Friday morning, much of the world knew who he was and where he lived.
The 94-year-old retired carpenter and father of six was a former officer in the SS, the Associated Press reported. Karkoc's unit was incorporated into the German armed forces after it first served as a paramilitary Ukrainian Nationalist group that collaborated with Nazi authorities.
That unit, according to AP research, was responsible for burning villages and killing many civilians in reprisals.
The AP also reported that documents place Karkoc in Warsaw at the time of the 1944 national uprising that was savagely put down by the Germans.
The news gained worldwide attention, with German and Polish authorities expressing interest in pursuing war crimes investigations. Karkoc could potentially lose his citizenship if it can be proved that he lied to U.S. authorities about his past when he came to the country.
Karkoc's youngest son, Andrij Karkoc, issued a sharp statement late Friday challenging the story and defending his father.
Calling the AP report "sensationalist and scandalous," he said it was "notably lacking in proof or evidence." He pointed out that the report said there was no evidence of his father taking "a direct hand in war crimes."