convictions that have been overturned, and on august 13, 2021, marty devlin and two other former homicidetheir own false statements in the tony wright case. >> martin devlin is charged with two counts of perjury and two counts of false swearing for false testimony. >> in a statement, devlin's attorney said that he is innocent and that devlin has spent 50 years fighting for justice for victims of crime. >> you're looking through a keyhole of a might bigger picture, this is a slice of a much bigger problem. >> district attorney larry krasner says toni wright's case is hardly unique and a culture of corruption has existed for decades. between 2019 and 2022, his conviction integrity unit has helped free 28 people, all victims of official misconduct. his office has investigated dozens of other cases. you are looking at the actions of the prosecutor, or the police? >> both. the biggest part of this problem is not just innocent mistakes, the biggest part of this problem is the abuse of power. >> in february 2020, krasner's office, together with defense attorneys, did something rarely seen. they