The person making the call should be easy to identify. First, it is likely a male student (males produce 75% of most school referrals, the student is likely a 9th grader (9th graders cause more referrals than the 10-12 combined), and has previous problems in school and is likely white (don't ask me why, but most bomb threats are by whites) and lastly is from a divorced family...now school officials have a workable list and it is really a small list actually. Most principals would be able to figure this out. Offer a reward...such actions cannot be kept hidden at a school and you will catch that student in short order. I could be wrong, but follow the percentages.

Sounds like the school is actually safe, but has been entertaining for this young man. My advice is to be calm and patient you will find him...if you really want to. Adults should be smarter than kids.