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ST. LOUIS (KSDK) - A 64-year-old Wentzville man pleaded guilty Monday to three instances of armed bank robbery last summer and to shooting a Missouri state trooper, U.S. Attorney Richard Callahan said.

According to court documents, Warren Gladders stole approximately $55,000 from three area banks in July, August, and September 2013. On July 7, Gladders took $7,000 from Reliance Bank in Creve Coeur; on August 2, Gladders stole $5,000 from First National Bank in Weldon Springs; and on September 20, he took $43,000 from First Bank in Marthasville. In all three robberies, Gladders displayed a firearm while threatening the bank teller.

Following the September 20 bank robbery, Gladders fled the scene in his car, but a witness outside the bank obtained a partial license plate number and description of the vehicle.

A trooper with the Missouri State Highway Patrol saw Gladders' vehicle and attempted to pull him over. Gladders eventually pulled over and the state trooper demanded he exit his car. As the state trooper approached, Gladders got out his car, pulled out a revolver and fired four shots at the trooper. One of the shots struck the trooper in the chest, but he was wearing a protective vest. The trooper returned fire, striking Gladders once in the leg.

Gladders fell over and dropped his gun. The trooper fired additional shots as Gladders attempted to reclaim his revolver. Those shots missed, but Gladders stopped moving and indicated he wished to surrender. The trooper took Gladders' gun away from him and placed him under arrest.

Investigators found a "sawed-off shotgun" inside Gladders' vehicle.

Warren Gladders will be sentenced on October 16, 2014. He faces up to 20 years in prison and fines up to $250,000 for each armed bank robbery charge. For discharging a firearm, Gladders faces a max sentence of life imprisonment.

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