Fla. Stat. § 849.31
In the event that suit is brought under the authorization of ss. 849.26 - 849.34 by someone other than the loser of the money or thing of value involved in the suit, such loser shall not be excused from being required to attend and testify or produce any book, paper or other document or evidence in such suit, upon the ground or for the reason that the testimony or evidence required of the loser may tend to convict her or him of a crime or to subject her or him to a penalty or forfeiture, but the loser shall not be prosecuted or subjected to any penalty or forfeiture for or on account of any transaction, matter or thing concerning which she or he may so be required to testify or produce evidence, and no testimony so given or produced shall be received against the loser upon any criminal investigation or prosecution. If the loser of money or thing of value involved in a suit brought under authorization of ss. 849.26 - 849.34, whether by her or him or by someone else, voluntarily attends or produces evidence in such suit, the loser shall not be prosecuted or subjected to any penalty for or on account of any transaction, matter or thing concerning which she or he may so testify or produce evidence, and no testimony so given or produced shall be received against her or him upon any criminal investigation or prosecution. Also, neither the fact of the bringing of suit under this act by a loser nor any statement or admission in her or his pleadings which is material and relevant to the subject matter of the suit shall be received against the loser upon any criminal investigation or proceeding.
Fla. Stat. § 849.31