Police officers who charged an Indiana man with illegal gun possession after finding the weapon in his car based on a tip from an anonymous caller did not have reasonable suspicion to stop the car, a unanimous federal appeals court ruled.The 7th U.S. Circuit Court of Appeals found that stopping the car based on an anonymous 911 call violated David Watson’s Fourth Amendment rights.While the call about boys possessing guns was somewhat accurate, the 14-year-old caller reported acts that, in Indiana, could have been …