A man who has been in solitary confinement for more than four decades in the US state of Louisiana has been freed, his lawyer says. Albert Woodfox was the last of a group known as “Angola Three” for their decades-long stays in isolation. He had been there since April 1972, after he was blamed for the death of a guard during a prison riot. Woodfox, 69, was awaiting a third trial after having two convictions overturned. He denies all the charges. His lawyers say he has served more time in solitary confinement than any prisoner in US history.