No judge of any court of record shall testify as to any matter of opinion in any action or proceeding in which any person related to such judge in the first degree shall be an attorney of record.
Wis. Stat. § 757.67
Testimony of judge of kin to attorney
Sup
Official source: Wisconsin State Legislature. Reproduced from public-domain Wisconsin statutes; confirm against the official source for the current text. Not legal advice.