Fed. R. Evid. 605

Judge’s Competency as a Witness

The presiding judge may not testify as a witness at the trial. A party need not object to preserve the issue.

( Pub. L. 93–595, § 1 , Jan. 2, 1975 , 88 Stat. 1934 ; Apr. 26, 2011 , eff. Dec. 1, 2011 .)