LITTLE ROCK-A Dallas-area doctor pled guilty this afternoon to obstructing a federal health care investigation. Cody Hiland, United States Attorney for the Eastern District of Arkansas, Michael C. Mentavlos, Special Agent in Charge of the Defense Criminal Investigative Service Southwest Field Office, Patrick Roche, Acting Special Agent in Charge of the Department of Veterans Affairs Office of Inspector General South Central Field Office, Miranda L. Bennett, Special Agent in Charge for the Office of Inspector General of the U.S. Department of Health and Human Services, and Diane Upchurch, Special Agent in Charge of the FBI Little Rock Field Office, announced Dr. Lorraine De Blanche, 56, pled guilty this afternoon before U.S. District Judge Brian S. Miller.