Where sufficient evidence existed to show that the defendant possessed a firearm as a felon, the U.S. District Court evidentiary decision to admit possibly irrelevant testimony was not prejudicial.The 7th U.S. Circuit Court of Appeals affirmed a decision by U.S. District Judge John J. Tharp Jr.In April 2015, eight men entered a Chicago railyard, broke into a freight train parked there and discovered a cache of Ruger firearms being shipped from a factory in New Hampshire to a distributor in Washington state.The thieves made …