than three years ago, the city's top prosecutor, kim gardner, found overwhelming evidence that lamar johnsonears, was innocent of murder, but the missouri attorney general continues to defend his conviction. johnson remains in a maximum security missouri prison. >> what i'm struggling with...is trying to understand why i have not been heard. >> i do think it is offensive that some other court or attorney general would try to intervene and keep someone in prison who the district attorney had properly investigated and determined to be innocent. >> reporter: what about all of the d.a.s and states attorneys who say we have to protect the integrity of convictions? >> not if we have it wrong. >> reporter: getting it wrong in the case of charlie dunn and joyce watkins caused them to lose everything. joyce will still need a ppardon from the governor to get any compensation, and so far there has been no justice for 4-year-old brandi. whoever killed her is still free. >> you never got to grieve, either, you never had the time to grieve the loss of brandi? >> no, i haven't. i'm going to go and visit he