The narc has a bark. Jacksonville High School students bringing narcotics to school after today will learn that. The Jacksonville Police Department plans Tuesday to unveil the newest tool in its fight against illicit drugs - Rocky, a child-friendly contender trained to sniff for drugs. The 19-month-old chocolate Labrador and its handler, District 117 school resource officer Dave Melbourne, will be in the hallways to greet students when they arrive for school. The dog will then make its debut during a ceremony at 11 a.m. Tuesday at the school, according to Superintendent Les Huddle. [continues 313 words]