Where a U.S. District Court judge adequately explained a decision, the judge was authorized to impose a federal sentence consecutively rather than concurrently with a state sentence.The 7th U.S. Circuit Court of Appeals affirmed a decision by U.S. District Judge David R. Herndon, Southern District of Illinois.In December 2012, United Parcel Service driver Steven Roberts was returning to his delivery truck after attempting to deliver a package when he noticed a man walking down the middle of the street.A blue minivan drove …