If your hearing it from a student, or the parents of students, it's almost certainly bullshit. The shit that has been spreading through my daughter's school 10+ miles from Sanford is insane, snapchat is 100% misinformation, and parents are also spreading the crap they're hearing from their kids on Facebook, scaring the crap out of other parents.

Every single authority is saying hoax right now, I've spent 40 minutes listening to the Sanford police scanner, they're not concerned, casually clearing and checking every part of the school, making sure everyone is accounted for, no talk of actual suspects, shooting, danger, anything.