On the Web site www.holywesternempire.org, James von Brunn described himself as "an artist and author who lives on Maryland's Eastern Shore". He also claimed a background as a Midwesterner who became a PT boat captain with the Navy reserves in World War II and later worked as an ad executive and film producer in New York City.
He said he has been a member of Mensa, and he has six chapters posted from a book he authored, "Tob Shebbe Goyim Harog!" which translates as "To Kill the Best Gentiles!" and claims to outline a Jewish plot against society.
Von Brunn's writings also outlined his 1981 bid to "place the treasonous Federal Reserve Board of Governors under legal, non-violent, citizen's arrest."
On the site, he claimed he unjustly received an 11-year jail sentence, of which he served 6.5 years, when he was arrested at the Fed after entering the building where the board of governors was meeting, carrying a camera and with weapons hidden under his trench coat.
Von Brunn argued the Fed was not allowed to exist under the Constitution and claimed it was a Jewish means of controlling the U.S. government.
"It is one of many parasitical Rothschild Central Banks infesting the world stage," he wrote on www.holywesternempire.org. "Its power ascends over every U.S. citizen from cradle to grave. Every dollar in your wallet is a note issued by the FED. The U.S. Government redeems that note (principal and interest) with your taxes. Through its enormous resources and power the FED controls the machinery of the U.S. Government."
A neighbor in Maryland described von Brunn as a standoffish man who didn't socialize with neighbors. The neighbor expressed shock upon hearing von Brunn had been identified as the alleged shooter.
"My God, I live next to that man," Harold O'Lynnger, 82, told ABC News.
O'Lynnger recalled a comment von Brunn had made over drinks three months ago that the media had been giving the Holocaust too much attention.
ABC News' Imaeyen Ibanga, Pierre Thomas, Lauren Pearle, Ariane de Vogue, Jack Date, David Kerley, Lisa Stark, Steven Portnoy, Dean Schabner, Polson Kanneth, Michael S. James and Andrew Miller contributed to this report.