158 Cal.App.4th 357 (Cal. Ct. App. 2007) Cited 35 times
In Chakos, the Court of Appeal held that, under Hunt, when a defendant offers evidence he lawfully possessed marijuana for medical purposes, a police officer's opinion testimony that the defendant possessed the marijuana for sale does not constitute substantial evidence to convict unless the officer has "expertise in distinguishing lawful patterns of possession from unlawful patterns of holding for sale."