A man convicted in a cash truck heist is on the run, according to the U.S. Marshals Service.

John Bernard Williams is wanted on a federal supervised release violation.

The 65-year-old has been on the run for nearly three years with a hefty IOU to the government, agents say.

On Jan. 11, 2021, the United States District Court for the District of Maryland signed off on a warrant for the arrest of Williams after he failed to adhere to the terms of his supervised release, court records confirm.

Williams spent nearly a decade behind bars after he pleaded guilty in 2013 to conspiracy to interfere with interstate commerce by robbery, interference with interstate commerce by robbery, and use and carry of a firearm during and in relation to a crime of violence.

According to the Marshals Service, on June 13, 2012, Williams and a co-conspirator robbed a Loomis armored truck as couriers were making a delivery to a Navy Federal Credit Union in Rockville.

Investigators said Williams and his co-conspirator approached the couriers with a semi-automatic weapon as they were unloading hundreds of thousands of dollars in cash from the armored truck.

Williams was arrested in July 2012 and entered into a plea agreement the following year.

A judge sentenced Williams to nine years in prison, followed by three years of supervised release.

Williams was also ordered to make monthly restitution payments for the $220,000 stolen in the heist, investigators said.

In 2021, investigators said Williams failed to comply with the terms of his probation and keep up with his monthly required payments.

Williams has a criminal history that dates back to the mid-’80s, when court records show he was found guilty of assault and battery in Maryland.

A couple of years later, records show he was convicted of felony theft.

Williams’ criminal activity continued into the ‘90s, with a 1992 arrest for transporting drugs across interstate lines and possession with intent to manufacture and distribute, according to court records.

In 1993, online records show he was found guilty of assault on a corrections employee.

Williams is now back on the run, and his whereabouts are unknown, according to the Marshals Service.

Williams is about 6 feet tall and weighs approximately 200 pounds. Investigators said Williams has a scar above his left eye.

Williams also goes by several aliases, including Ricky Houser, Aaron Thomas, and Steve Carr.

The Marshals Service warns Williams is known to have violent tendencies.

Anyone with information on his whereabouts is asked to contact 202-819-5058. Callers can remain anonymous and could earn a reward.