Appellate panel hears dispute over collateral estoppel after grand jury presentment in Knox County DUI case

An appellate panel heard competing arguments over whether a Knox County criminal prosecution should be blocked by collateral estoppel after a circuit court granted summary judgment in an implied-consent dispute tied to a driving-under-the-influence case.

Garrett Ward, representing the State of Tennessee, told the court the indictment returned by a March 2023 grand jury was a formal finding of probable cause and that the criminal-court dismissal based on collateral estoppel should be reversed. "The grand jury returned a presentment, and that is a formal finding of probable cause," Ward said, arguing that Tennessee law generally does not permit peeling back a grand jury's determination.

Ward outlined the case history: the matter began in Knox County General Sessions Court as a DUI prosecution that included an implied-consent allegation; the defendant appealed the implied-consent finding to circuit court and filed a Rule 56 motion challenging the implied-consent determination. Ward told the…