Mroszak spent one year in federal prison for tax evasion. He was arrested after saying on the November 9, 2004 "Howard Stern Show" that he did not file a tax return in many years and would not resume filing until the U.S. government cured his Gulf War Syndrome. An IRS employee happened to be listening and reported him. Mroszak pleaded guilty to tax evasion in federal court in December 2004, and was sentenced to one year in prison and ordered to pay his outstanding taxes.