Wisconsin Statutes Organization of State Government (Ch. 13 to 22) § 13.35. Liability of witness

(1) No person who is required to testify before either house of the legislature or a committee thereof, or joint committee of the 2 houses, and is examined and so testifies, shall be held to answer criminally in any court or be subject to any penalty or forfeiture for any fact or act touching which the person is required to testify and as to which the person has been examined and has testified, and no testimony so given nor any paper, document or record produced by any such person before either house of the legislature or any such committee shall be competent testimony or be used in any trial or criminal proceeding against such person in any court, except upon a prosecution for perjury committed in giving such testimony; and no witness shall be allowed to refuse to testify to any fact, or to produce any papers, documents or records touching which the person is examined before either house or any such committee, for the reason that the testimony touching such fact, or the production of such papers, documents or records may tend to disgrace the person or otherwise render the person infamous.

(2) The immunity provided under sub. (1) is subject to the restrictions under s. 972.085.