In 1972, inmates Robert Hillary King, Albert Woodbox, and Herman Wallace were put in solitary confinement in Louisiana State Penitentiary (a.k.a. Angola Prison), after being convicted under questionable circumstances for the killing of a prison guard.

Because of their work organizing on behalf of the Black Panthers, Robert King spent 29 years in solitary confinement before his conviction was overturned and he was released. Wallace was released in 2013, after more than 41 years in prison