BOSTON – A Boston University medical student was arrested Monday in the shooting death in a hotel of a masseuse and the robbery of another woman who both advertised their services on Craigslist. Phil Markoff, 22, was arrested during a traffic stop Monday afternoon on Interstate 95 in Walpole, south of Boston, Police Commissioner Ed Davis said at a news conference to announce the arrest. He is also suspected of being connected to an assault on a Las Vegas exotic dancer in Rhode Island last week. "We are very, very happy to have this man off the street in such...