Authorities have arrested four local teenagers in connection with a stabbing that stemmed from an apparent setup in a north Forsyth neighborhood. The Forsyth County Sheriff’s Office has charged Michael Summerlin, 19, of Forsyth County, with two counts of aggravated assault. Also charged were Joshua Massey and Nicolas Miraglia, both 18 and also of Forsyth County, and a 16-year-old girl.