Fla. teen arrested for threat to "shoot everyone" Police have arrested a Florida teen who they say posted a Facebook message threatening to "bring a gun to school tomorrow and shoot everyone." The St. Lucie County Sheriff's office said Thursday night that they received a tip from a parent who saw the threat from the 13-year-old student. Neither the teen nor his school has been identified. A sheriff's spokesman says the student did not have access to any weapons. No schools were evacuated or locked down, but security at area schools had already been increased as a result of the mass shooting at a Connecticut school last Friday. The student is charged with a single second-degree felony charge of making a written threat. Authorities say he is being held at the Juvenile Detention Center in Fort Pierce.