It happened Tuesday afternoon at the Compassionate Care Center of Michigan on Main Street in Dryden.
No arrests were made. No charges were issued.
This search warrant says it all. Investigators believe the dispensary is dispensing marijuana illegally, allowing people with state-issued cards to just come in and purchase pot, and not from a caregiver.
"They were not listed as their actual caregivers, which is a question of the law," said Lapeer County Sheriff Ron Kalanquin.
It's at the crux of yet another heated debate centered around Michigan's medical marihuana program.
"If the government feels the law is vague or that it needs to be better defined, it needs to turn to the judiciary to do it," said Jim Rasor, the Royal Oak attorney representing the Dryden dispensary.
The dispensary, raided Tuesday, says he believes the authorities are trying to exploit any "vagueness" in the law about patient to patient transfers.
"I think the patient-to-patient transfer is completely allowable pursuant to the Michigan Medical Marijuana Act, and if the law enforcement community, the prosecutors, the sheriffs think differently, then they should be erring on the side of caution especially when dealing with people that have cards," Rasor said.
Dispensaries are not addressed in the state act.
"I foresee this being an evolving process," Kalanquin said. "We're trying to establish some guidelines for the people."
The search warrant -- signed Monday -- outlines three accounts of people with cards, but not caregivers purchasing pot from the dispensary.
According to the search warrant, a township police officer recently witnessed about 100 cars coming and going from the business during his eight-hour shift.
Lapeer County Prosecutor Byron Konschuh declined to comment as he's not seen the police reports.