The current FBI Law Enforcement Bulletin has an article that reads like something you would see on a television "CSI" show and dismiss as utterly unrealistic.  But it is real. 

John McHenry and Michael Gorn report on a child pornography investigation from Sarasota, Florida.  High resolution images "included adult hands and pornographic images of infants."  The images were high enough resolution to get fingerprints off of them, nailing the perpetrator.