ST. LOUIS (AP) — A 64-year-old eastern Missouri attorney and businessman has pleaded guilty to federal bank robbery charges, admitting that he was responsible for three heists last summer and shot a Missouri state trooper. Warren J. Gladders, of Wentzville, entered the guilty plea Monday in U.S. District Court in St. Louis. Sentencing is Oct. 16. Federal prosecutors say Gladders robbed a Reliance Bank branch, in Creve Coeur, of $7,000 on July 7, 2013; the First National Bank, in Weldon Spring, of $5,000 on Aug. 2; and the First Bank, of Dutzow, of $43,000 on Sept. 20. In all three cases, Gladders showed a gun. Gladders shot a trooper who pulled him over after the third robbery, but a bulletproof vest saved him. Gladders is still facing state charges.