New York, February 18 (RHC)-- Amnesty International has renewed its call for Louisiana to release the longest-serving U.S. prisoner in solitary confinement.

Former Black Panther Albert Woodfox’s conviction has been overturned three times, and in November an appeals court upheld the latest court order for his release.

But last week, a Louisiana grand jury re-indicted Woodfox for the 1972 murder of a prison guard. He and the late Herman Wallace, another member of the Angola 3, said they were framed for their political activism.

In a statement, Amnesty International called for Louisiana Attorney General Buddy Caldwell to "stop pursuing a campaign of vengeance by trying to re-indict a man who has already spent more than four decades in cruel confinement, after a legal process tainted with flaws." Woodfox turns 68 this Thursday.