RUTHERFORD COUNTY, Tenn. (WKRN) — An off-duty Decherd officer forced a driver to get on the ground at gunpoint during an apparent road rage incident in Rutherford County, according to an arrest warrant.

The warrant states 31-year-old Mathew Ward observed a Franklin man speeding on Interstate 24 Sunday evening, so he flashed his police badge and signaled for the driver to slow down.

Ward then pursued the driver at speeds of 120 miles per hour on the interstate until they both exited onto Medical Center Parkway and turned onto Silohill Lane, according to the police report.

After both men got out of their vehicles, investigators said Ward pointed his department-issued gun at the driver, ordering him to get on the ground.

The warrant describes the incident as a case of “road rage.”

Ward was arrested and booked into the Rutherford County jail Monday on a charge of aggravated assault. He was later released after posting a $5,000 bond.

The Decherd police chief told News 2 that Ward had been employed with the department for a few months.

Ward was initially suspended without pay, but the chief said he resigned from his position Tuesday morning.