California, United States of America
The following excerpt is from People v. Jurian, B244575, B250118 (Cal. App. 2018):
14. The Attorney General also points out that "violations of prosecutorial rules at grand jury proceedings become immaterial and harmless once a petit jury has convicted the individuals in question of the crime beyond a reasonable doubt." (See People v. Becerra (2008) 165 Cal.App.4th 1064, 1072 [defendant's conviction shows perjury before grand jury "was immaterial and would not warrant reversal" after trial].)
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