James von Brunn
Von Brunn was arrested in 1981 for attempted kidnapping and hostage-taking of members of the Federal Reserve Board of Governors after approaching the Federal Reserve's Eccles Building armed with a revolver, knife, and sawed-off shotgun.  Von Brunn later described his actions as a "citizen's arrest for treason."  He reportedly complained of "high interest rates" during the incident and was disarmed without any shots being fired, after threatening a security guard with a .38 caliber pistol.  He reportedly claimed he had a bomb, which was found to be only a device designed to look like a bomb.  He was convicted in 1983 for burglary, assault, weapons charges, and attempted kidnapping.  Von Brunn's sentence was completed by September 15, 1989, after he had served six and a half years in prison.  After he was released he successfully tested for and joined Mensa International; however, he was eventually dropped from membership for failing to pay his annual dues.