An elderly former lawyer is being held on charges that he robbed a bank and shot a cop, but is also suspected of having pulled up to six bank heists, police said.

Warren Gladders, 64, appeared in court on Tuesday and was charged with attempted assault, two counts of armed criminal action, robbery, and unlawful possession of an illegal weapon. He did not enter a plea and was remanded to jail.

Gladders, who graduated from Colgate University and Washington University School of Law, requested that his law license to be listed as inactive last year, according to the Missouri Bar. When he was arrested on Sept. 21, he was president of Apex Laundry and Dry Cleaning Equipment Co. Police also searched his home in Wentzville, authorities said.

He is accused of robbing a Missouri bank at gunpoint and shooting a state trooper in the chest during the robbery. The officer survived.

Gladders is a suspect in additional bank robberies.

Rebecca Wu, spokesperson for FBI in St. Louis, said, "We're still investigating at this time, but we fully intend to pursue federal charges against him."

Gladders was briefly represented by Michael Hufty, an attorney at Kessler Williams, but said the firm "had a conflict of interest and withdrew immediately after the sheriff denied us access to the client while he was in the hospital."

Gladders shared a house with his brother-in-law Don Weir Jr., 60, who a few years ago had pleaded guilty to mail fraud involving gold and rare coins, court records show.