No person shall be excused from giving any testimony or evidence upon any investigation or prosecution for violation of this article upon the ground that the testimony would tend to convict him or her of a crime, but the testimony or evidence shall not be received against him or her upon any criminal investigation or prosecution, except in prosecution against him or her for perjury committed in giving testimony. The article providing for an inquiry into violations of the liquor laws shall be applicable to inquiries into violations of the ordinances against gambling.
(`90 Code, § 14-8)