Story here. Excerpt:

'The victim incorrectly identified Briscoe. He refused a plea deal offering 20 years in prison. And then he was convicted, sentenced in his mid-20s to 45 years behind bars.
...
By then Briscoe had done 24 years behind bars and been denied parole because he refused to express remorse for a crime he didn't commit...

Two months before the parole hearing, two DA's investigators showed up at prison and handed Briscoe an envelope. In it was a long, white swab used for DNA sampling.
...
"They said in 24 hours we'll be back with the results. And the results were beautiful," he says.

He was free the next day.'