Misty "Ariel" Renee Kornegay, 15, tells police he beat her
                                
                                
                                    (Newser) -
                                    In a case Florida officials call "deeply disturbing," two sisters allegedly colluded to shoot and kill their 16-year-old brother while their parents were away, reports  WFOX . Misty "Ariel" Renee Kornegay, 15, and her 11-year-old sister, Nicole, were arrested Monday and charged with premeditated murder. "Anytime you...