Where a U.S. District Court judge gave the defendant only a small credit for time served on a charge related to a racketeering conviction, the judge was well within her discretion to do so.The 7th U.S. Circuit Court of Appeals affirmed a decision by U.S. District Judge Rebecca R. Pallmeyer.Ulises De La Cruz was a member of the Latin Kings street gang starting when he was a teenager. De La Cruz steadily rose through the ranks …