Willard Anthony Montgomery, 52, the man who was charged with robbing a bank inside of the Covington Wal-Mart and threatening the staff with "explosives" pleaded guilty to armed robbery and hoax devices last week.

Montgomery was sentenced by Newton County Superior Court Judge Samuel Ozburn to 20 years for armed robbery and 10 years for hoax devices, as well as ordered to pay restitution. He must serve at least 10 years before being eligible for parole.

He was originally arrested on November 19, 10 days after he walked into Wal-Mart wearing a disguise and robbed the United Bank by allegedly informing a teller that the black plastic box he had placed on the counter was full of explosives.

He discarded a wig, baseball cap, glasses, dust mask and a walking cane just outside of Wal-Mart. He also left behind the black plastic box, causing the store to be evacuated and the Georgia Bureau of Investigation Bomb Squad to be called in as a precaution. The building was shut down for roughly two hours and treated as a crime scene.

Several pieces of evidence were collected, which pointed investigators to Montgomery. Authorities said his motive seemed to be desperation.