convicted for murder, malcolm scott and de'marchoe carpenter wrote thousands of letters asking for help to prove their innocence. finally, private investigator ericred. working with the oklahoma innocence project, cullen methodically poked holes in the prosecution's case. now, they would visit key witness, and death row inmate, michael wilson. but could they reach him in time? back to the long road to freedom. narrator: by 2013, malcolm had been in prison for 19 years. his brother corey for 22. you ready to go mom? ready to go? narrator: the days when their mom, ruthella, came to visit helped them hold on. the brothers drew strength from her. man, that lady been right there. i never had to wonder if she still cared or if she was still fighting for me, still believing in me, still praying on me. narrator: and malcolm was hopeful his mom's prayers would be answered. two prosecution witnesses had told his investigative team that their testimony was a lie. that left michael wilson, the man who told police he'd given de'marchoe bullets and hid the murder weapon for him. if he recanted too, malcolm thought they had a chance. but michael wilson refused