The last mile

The terrible injury of the head received on the football field not only cut off the sports career of Amos Deer. Now he is the owner of a unique memory, and is able to remember literally everything that I have ever seen or heard. Well, the suddenly acquired superpower came in handy for his new job - service in the police.
The FBI attracted decree to the special team to investigate the most mysterious crimes. On the way to the base, Amos accidentally heard a report on the history of a person on the radio, twenty years ago sentenced to death for the murder of his parents - and just the other day the verdict should be carried out. Deer remembered this man well - in ancient times they met on a football field. And I am sure: he is innocent