Tiptonville, Tenn. -- The city's fire chief and three volunteer firefighters, including the chief's grandson, were arrested on arson charges stemming from a string of fires over the past two years. The four men, all members of Tiptonville Volunteer Fire Department, were arrested Monday and expected in court later Tuesday. Police Chief Norman Rhodes said the investigation had been going on for about two years "We've been pretty sure who it was for about the last year," Rhodes said. He didn't give a motive for the arsons beyond saying the suspects had formed a clique. Fire Chief James Blackburn, who...