SHERMAN, Texas (KTEN) — A man accused of robbing more than half a million dollars from five banks in Grayson, Fannin and Collin counties has pleaded guilty to federal charges.

The U.S. Attorney's Office said Kevin Long, 30, faces up to 20 years in prison when sentenced.

Long entered a guilty plea Monday before U.S. Magistrate Judge Christine A. Nowak in Sherman to his role in holdups at these financial institutions:

"During the robberies he passed threatening notes to bank employees, he physically restrained bank employees, and he stole over $550,000," the attorney's office said in a written statement.

Long's term of imprisonment will not be determined until after a pre-sentence investigation by the U.S. Probation Office.

Kevin James Long pleaded guilty to a string of North Texas bank holdups.