The link below follows up on the article. Apparently he had Nazi literature, posters and weapons. Here a quote:

"Officials also discovered a vintage Nazi armband, a knife bearing swastikas and a vintage dagger with Gothic German lettering. His basement library included manuals on explosive and ammunition reloading, police said, as well as a copy of "Abandonment of the Jews," a book by David S. Wyman that accuses President Roosevelt of being anti-Semitic for refusing to intervene in the Holocaust earlier than he did"

http://www.silive.com/news/advance/index.ssf?/base/news/1083331006203760.xml