A man arrested on charges of robbing Littleton Road liquors last October has now pleaded guilty according to a release from the Middlesex County District Attorney Gerry Leone on Thursday.

Michael Whitcomb, 41, of Beverly, had initially pleaded not guilty to charges of unarmed robbery and assault and battery stemming from the October incident.

Following the change of his plea, Whitcomb has been given a sentence of seven to nine years in state prison by Lowell Superior Court Judge Janet Kenton-Walker , to run concurrently with his current state prison sentence in Essex County for additional robbery charges.

“This defendant has now admitted to robbing a liquor store and, in the process of doing so, viciously attacked the female clerk, injuring the victim, before taking money from the register and fleeing the scene,” District Attorney Leone said.  “We commend the bravery of the victim, as well as the victim’s son who heard his mother’s cry for help and intervened, causing the defendant to flee.”

Shortly after the incident in October, Westford Police posted video surveillance showing Whitcomb and his female accomplice, Jennifer Avola, 33 of Danvers during the time of the incident at the store on their Facebook page.