Gift link to New York Time article about the overturning of the 2009 murder conviction of Arvel Marshall. During the trial, he repeated asked his attorney, prosecutors and the judge for the surveillance videos that he felt would prove his innocence. They first denied that video existed and then denied his request. After being jailed for sixteen years (the conviction was for 25 years to life), he was finally released and the video did, in fact, show the murderer was not him.
Not sure if this should instead have been posted in the evil MFers thread; neither really fits and there isn’t one for the criminally negligent.