LITTLE FALLS — A Morrison County judge dismissed a lawsuit filed by Byron Smith over a book written by a former Morrison County Sheriff’s sergeant who served as the lead investigator on Smith’s double murder case. Smith,serving a life sentence in prison without parole for the 2012 murders of 17-year-old Nicholas Brady and 18-year-old Haile Kifer in his Little Falls home, filed a defamation civil lawsuit Aug. 8 in Morrison County District Court t…