The judge presiding at the trial may not testify in that trial as a witness. No objection need be made in order to preserve the point.
Wis. Stat. § 906.05
Competency of judge as witness
Applied in 3 court decisions — leading case State v. Brent T. Novy (2013)
Most recently applied in State v. Brent T. Novy (March 2013)
Sup
How often courts cite this section
Court decisions citing this, by year. The dip in the last several years is a data-coverage gap, not a real trend — our corpus holds fewer opinions from the most recent years, so recent citations are undercounted.
Official source: Wisconsin State Legislature. Reproduced from public-domain Wisconsin statutes; confirm against the official source for the current text. Not legal advice.