California, United States of America
The following excerpt is from Story v. Story (In re Story), H044265 (Cal. App. 2018):
trial. The violation also 'does not render the witness incompetent to testify, and does not furnish grounds to refuse permission to testify, at least where the party who seeks to offer the testimony was not "at fault" in causing the witness's violation of the exclusion order. [Citations.]' [Citation.]" (People v. Adams (1993) 19 Cal.App.4th 412, 436 (Adams).)
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