State law.
Florida Crimes Sections 776.012, 776.031 and 776.032 defines no civil liability exist for a person who uses of force in defense of person, including themselves.
776.012 — Use of force in defense of person.—A person is justified in using force, except deadly force, against another when and to the extent that the person reasonably believes that such conduct is necessary to defend himself or herself or another against the other’s imminent use of unlawful force.
776.032 Immunity from criminal prosecution and civil action for justifiable use of force**.—(1) A person who uses force as permitted in s. 776.012, s. 776.013, or s. 776.031 is justified in using such force and is immune from criminal prosecution and civil action for the use of such force, unless the person against whom force was used is a law enforcement officer, as defined in s. 943.10(14), who was acting in the performance of his or her official duties and the officer identified himself or herself in accordance with any applicable law or the person using force knew or reasonably should have known that the person was a law enforcement officer. As used in this subsection, the term “criminal prosecution” includes arresting, detaining in custody, and charging or prosecuting the defendant.
776.031 Use of force in defense of others.—A person is justified in the use of force, except deadly force, against another when and to the extent that the person reasonably believes that such conduct is necessary to prevent or terminate the other’s trespass on, or other tortious or criminal interference with, either real property other than a dwelling or personal property, lawfully in his or her possession or in the possession of another who is a member of his or her immediate family or household or of a person whose property he or she has a legal duty to protect. However, the person is justified in the use of deadly force only if he or she reasonably believes that such force is necessary to prevent the imminent commission of a forcible felony. A person does not have a duty to retreat if the person is in a place where he or she has a right to be.
My understanding is there has to be a hearing to “affirm” the jury’s findings of justified defense. My understanding is this ensures a person that got off on a technicality (not reading him his rights) doesn’t duck the civil penalty. But I could be understanding incorrectly.