A Providence firefighter is accused of assaulting his girlfriend in North Smithfield. Brian Dwyer of Woonsocket was charged with domestic assault and battery earlier this week. Police say the couple got into an argument at a Walmart. Dwyer allegedly grabbed the woman's arm and dragged her from the store. Witnesses called police, and the girlfriend didn't suffer serious injuries. Dwyer pled not guilty and is due back in court next week. He has been suspended from the Providence Fire Department during the investigation.