The group accused of attacking a man in Boston during a white supremacist march on Saturday should be prosecuted “within the fullest extent of the law,” the city’s mayor said Tuesday. Mayor Michelle Wu said there’s an ongoing investigation into the alleged assault. Wu’s comments come after dozens of masked white supremacists marched through downtown Boston on Saturday, CBS Boston said. One man, 34-year-old Charles Murrell, said he was surrounded and attacked by men with shields, CBS Boston reported. The alleged assault left him with cuts on his head, hand and eyebrow, he said. Boston police told CBS Boston that...