Several children have been arrested and charged for the death of a 15-year-old boy, who was found floating in a retention pond. Zahmere Greene, 15, of Columbus, Georgia, was found dead in a retention pond less than a mile from the Chattahooche River just before 2:30 pm on May 29. However, he actually drowned on May 23 and his death was not reported until six days after, according to authorities. Greene's death was ruled as a homicide by the medical examiner at the Muscogee County Coroner's Office, police spokesperson Brittany Santiago told USA TODAY Friday. After further investigation, police discovered...