Michigan police used plate readers to track man across state, court filings suggest marijuana search pretext

404 Media reports law enforcement leveraged automated surveillance technology to create grounds for cannabis-related stop.

FILE — police lights · Tony Webster / CC BY-SA 2.0

According to 404 Media, Michigan police used automated license plate readers to track a man across state lines and establish a basis for a marijuana-related search. The case arrives as Michigan courts have recently narrowed vehicle-search authority: the state Supreme Court ruled on July 23 that searches grounded in low-level marijuana violations are illegal, a decision that may constrain how law enforcement justifies similar stops.

The incident reflects broader friction in Michigan's cannabis enforcement landscape. Recent coverage documents repeated operator violations—34-day security-video gaps, METRC compliance failures affecting 20+ licensees, dispensary closures for selling recalled products—alongside a July 23 Supreme Court ruling that constrains vehicle searches on marijuana grounds. Whether this tracking case involves similar low-level pretexts remains unclear from available reporting.

Watch whether this case prompts clarification of what constitutes a lawful pretext for vehicle stops in Michigan post-July 23, and whether the state CRA reviews officer training on search-and-seizure boundaries in cannabis contexts.