Scenario: You are carrying in a business that happens gun free zone. Employees are not aware you are armed until a robber/crazed madman with a gun storms the entrance and you neutralize the threat. What now?

Inb4 ask a lawyer, but I’m wondering if stopping a severe threat to the public would supersede the breach of legality in carrying in a GFZ. For geographical context, I’m from the Illinois where gun free zones carry the full weight of law, but I’d love to hear other answers in the context of states other fellow CCWers are from.Edit: Happens to be a* via /r/CCW http://ift.tt/2FBrDNm