Wis. Stat. § 13.34

Every refusal to testify or answer any question, or to produce keys, books, records, documents or papers before any committee included within s. 13.31 shall be forthwith certified to the proper house by the chairperson of such committee. Such certificate shall be transmitted, and the person so refusing taken, by the sergeant at arms or an assistant to the sergeant at arms, before such house to be dealt with according to law.