Totally agree. I used to be a forensic sciences instructor. I always had each of my students research a death penalty case where the defendant was eventually exonerated and give a presentation on all of the details, including the crime, why the person was arrested, the evidence, the years wrongfully incarcerated, an account of every instance of the defendant facing imminent death, and the compensation given for, in MANY instances, the decades spent behind bars for a crime they didn't commit. Occasionally, there were tears in the classroom!
One of the biggest injustices is those who were repeatedly denied the chance to introduce new evidence post-conviction, especially after DNA tech was introduced. Another was the surprisingly high rate of erroneous eyewitness testimony. Classic, I'd have another instructor enter the room for a brief side discussion with me. After the other instructor left, I had the students give a complete description of him or her: height, hairstyle and color, clothes worn, tats, scars, etc. Remarkably poor results.