(a) A person is not excused from giving testimony or producing evidence when legally required at the trial of another person charged with violating a law relating to fire insurance on the ground that the testimony or evidence may incriminate the person under the laws of this state.
(b) A person may not be prosecuted or subjected to a penalty or forfeiture for or because of a transaction, matter, or thing about which the person testifies or produces evidence under this section.