A Parkway High School student has been arrested after school officials found a posting on Facebook describing violent threats to the school.  17-year-old Nolan Asszony was booked into Bossier Max on a charge of terrorizing.  Bossier Sheriff's Captain Danny Dison, who's also Director of Security for the Bossier Parish School System, says the posting went into great detail on how Asszony would carry out his plan of violence.  He says he wants to ensure parents, students, and faculty at Parkway that there is no imminent threat to the school.