Preamble
"SEC. 2. The immunity granted hereunder shall not attach should it turn out subsequently that the information and/or testimony is false and malicious or made only for the purpose of harassing, molesting or in any way prejudicing the public officer denounced. In such a case, tie public officer so denounced shall be entitled to any action, civil, administrative or criminal, against said informant or witness: Provided, however, That such action may be commenced only after the dismissal of the case against the denounced public officer after preliminary investigation or after the latter's acquittal by a competent court. "The prescriptive periods for the various actions under the provisions of this section shall start to run from the time such actions may be commenced as herein provided."