Gregory Parker, 51, of Laurel, Mississippi and Brantley Paul Nichols, D.M.D., 42, of Oxford, Mississippi were sentenced today by Senior U.S. District Judge Keith Starrett for conspiracy to commit health care fraud, announced U.S. Attorney Mike Hurst, Special Agent in Charge Michelle Sutphin with the Federal Bureau of Investigation in Mississippi, and Special Agent in Charge Cyndy Bruce of the Defense Criminal Investigative Service's ("DCIS") Southeast Field Office.