A Louisiana man released from prison on Tuesday after 41 years in solitary confinement has died of liver cancer.
Herman Wallace, 71, died on Friday morning, his lawyer told the BBC.
He was freed after a federal judge ruled his 1974 murder conviction violated his right to a fair trial.
Wallace, one of the so-called Angola Three convicted in the murder of a prison guard, was diagnosed with cancer this year. He had maintained his innocence until his death.
"He passed away early this morning among people who cared for him very much," Wallace's lawyer, George Kendall, told the BBC.
Mr Wallace was one of three men convicted of the 1972 murder of prison guard Brent Miller. Known as the Angola Three, they have maintained their innocence.