Robert King said he and two fellow inmates were framed for serious crimes including murder while in prison, partly because they had joined black nationalist movement the Black Panthers.
He spent 29 years in solitary confinement at Angola Prison, Louisiana and is now campaigning for the release of the other members of the "Angola Three".
He told Hardtalk's Tim Franks that, while prison was horrible, he saw himself as a victim not a perpetrator. His political awareness and this "different mindset" helped him "weather the storm", he said.
You can watch the full interview on BBC World News on Wednesday 26th October at 03:30 GMT, 08:30 GMT, 15:30 GMT and 20:30 GMT. And on BBC News Channel on Wednesday 26th October 2011 at 0430 BST, and on Friday 28th October 2011 at 0030 & 0430 BST.
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