On Wednesday, the Michigan Supreme Court held in a 5-1 opinion that the odor of marijuana alone isn’t a sufficient reason for police to conduct a warrantless search of a car. In 2018, the possession and use of small amounts of marijuana by people who are at least 21 years old became legal. However, the law specifies that marijuana cannot be used while operating a vehicle.
In the opinion, Justice Megan Cavanagh notes that “the smell of marijuana might just as likely indicate that the person is in possession of a legal amount of marijuana, recently used marijuana legally, or was simply in the presence of someone else who used marijuana” and that the smell “no longer constitutes probable cause sufficient to support a search for contraband.”