Boston police raided and shut down an Uphams Corner convenience store Friday that had been selling students knives and replica pellet pistols, officials said. They said the replicas looked so much like real guns that police feared they could fuel neighborhood violence. Captain James Hasson said that police learned about the store's activities from the principal of the New Boston Pilot Middle School in Grove Hall. Three students were expelled for bringing the pellet guns to school, Hasson said. It is legal to sell the guns, Hasson said...