Plea agreement: False confession obstructed justice

This undated photo provided by Amir Ali shows Ali, from left, Corey Williams and Ali's co-counsel Blythe Taplin posing for a photo at the Louisiana State Penitentiary in Angola, La. Williams, a mentally disabled man, walked free Tuesday, May 22, 2018, after 20 years in prison for a killing his attorneys say he didn't commit, under a plea agreement that blames him for obstructing justice by falsely confessing to the crime. (Courtesy of Amir Ali)
FILE - These undated file booking photos made available by the Shreveport Police Department show Corey Williams. A Louisiana judge has ordered the release of Williams, an inmate whose attorneys have accused prosecutors of withholding "staggering" evidence of his innocence in a pizza deliveryman's killing two decades earlier. One of Williams' attorneys says a plea deal with Caddo Parish prosecutors will allow Williams to be freed as soon as Tuesday, May 22, 2018, from Louisiana State Penitentiary at Angola. (Shreveport Police Department via AP, File)

Plea agreement: False confession obstructed justice

This undated photo provided by Amir Ali shows Ali, from left, Corey Williams and Ali's co-counsel Blythe Taplin posing for a photo at the Louisiana State Penitentiary in Angola, La. Williams, a mentally disabled man, walked free Tuesday, May 22, 2018, after 20 years in prison for a killing his attorneys say he didn't commit, under a plea agreement that blames him for obstructing justice by falsely confessing to the crime. (Courtesy of Amir Ali)
FILE - These undated file booking photos made available by the Shreveport Police Department show Corey Williams. A Louisiana judge has ordered the release of Williams, an inmate whose attorneys have accused prosecutors of withholding "staggering" evidence of his innocence in a pizza deliveryman's killing two decades earlier. One of Williams' attorneys says a plea deal with Caddo Parish prosecutors will allow Williams to be freed as soon as Tuesday, May 22, 2018, from Louisiana State Penitentiary at Angola. (Shreveport Police Department via AP, File)