MEDFORD - The couple accused in a robbery spree to allegedly feed their drug habit pleaded not guilty during their arraignment in court Wednesday afternoon.

Christopher Marino, 29, and Jamie Greco, 23, of Medford, are accused in 15 armed robberies at fast-food establishments, gas stations and convenience stores.

Assistant District Attorney Lawrence Opisso said shop keepers at Subway, KFC, 7-11, Carvel and even some gas stations were terrorized between early December and Jan. 7. 

Both Marino and Greco are scheduled to appear in court on March 5. If convicted, they face up to 15 years in prison.