Lawful Self-Defense - Weapons - Division of Licensing, FDACS:
Q. What if someone uses threatening language to me so that I am afraid for my life or safety?
A. Verbal threats are not enough to justify the use of deadly force. There must be an overt act by the person which indicates that he immediately intends to carry out the threat. The person threatened must reasonably believe that he will be killed or suffer serious bodily harm if he does not immediately take the life of his adversary.