Phillip Monroe Ballard, 72, had claimed he was sovereign citizen immune from U.S. laws.
Federal law enforcement officers and prosecutors did not agree. Ballard was charged and convicted of trying to hire a hit man to kill a federal judge.
He was sentenced Monday to 20 years in federal prison.
You may recall earlier reports of how Ballard was suspected in 2012 of trying to arrange the killing of U.S. District Judge John McBryde.
At the time, Ballard faced charges of filing false tax returns and corrupt interference with Internal Revenue Service laws.
But the murder-for-hire plot was thwarted by a federal inmate and an FBI agent posing as the hit man, federal officials said.
The tax charges are still pending.
-- Bill Miller