The U.S. Department of Justice announced that 52-year-old Wade Ashley Walters of Hattiesburg has been charged in one of the nation’s largest health care investigations involving fraudulent prescriptions. People insured by TRICARE were targeted, which covers military members, their families, retirees and some National Guard members and reservists. The fraud led to TRICARE and other health care benefit programs reimbursing various companies more than $510 million.