An erroneous application of the criminal law in the course of criminal proceedings will not generally demonstrate jurisdictional error sufficient to engage the supervisory jurisdiction of the Court of Appeal. Where no interlocutory judgment or order has been made, the appropriate form of supervisory relief is prohibition rather than certiorari, but prohibition requires demonstrated or threatened jurisdictional error. A mere expression of opinion on a legal principle at an interlocutory stage does not provide a basis for intervention.
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