A staff member in Sen. Lamar Alexander's Knoxville office is charged with felony identity theft, accused of using a stolen debit card to take some $6,000.

Jonathan C. Griswold, 38, is set to appear April 13 in Knox County General Sessions Court, records show.

He could not be reached Thursday for comment.

David Cleary, the senator’s chief of staff, issued a statement on Friday about the charges, "Senator Alexander was disappointed to hear of Jonathan’s arrest and has accepted his resignation. Based on the information we have today, the charges have nothing to do with his official duties.”

Griswold formerly worked as constituent services manager for Knox County Mayor Tim Burchett. He resigned abruptly in 2013, soon after he was found to have consumed alcohol and then used a county vehicle, personnel records showed.

According to the ID theft warrant, Griswold used someone's stolen Home Federal debit card to make ATM withdrawals from the bank at 5538 Kingston Pike. Griswold had the victim's PIN number, the warrant states.

In all, the victim lost about $6,000, according to the warrant.

Griswold could be seen on the Home Federal bank ATM surveillance camera making the withdrawals, the warrant states.

Griswold worked for Burchett for several years in the 2010s.

In April 2013, Burchett reported the disappearance of nine $100 bills from his office. Knoxville police were called in.

After a couple days, Griswold reported finding the money near a desk outside the mayor's office.

The mayor told KPD a couple weeks later he did not want to pursue the police investigation anymore.

In August 2013, Griswold abruptly left Burchett's office. A review of his personnel files showed he'd been caught drinking alcohol and then driving a county vehicle. He lied about it later, records showed.

It was Griswold's job to respond to residents' concerns and complaints. He previously worked for U.S. Rep. John J. Duncan Jr.