| Photo: Frankie Frost/Marin Independent Journal |
| Lynette Shaw of Marin Alliance for Medical Marijuana dispenses medical cannabis to a patient |
The U.S. Internal Revenue Service is thought to have begun audits on at least 12 medical marijuana dispensaries in California, under the decision that past business deductions are invalid because of a clause in the federal tax code prohibiting businesses that traffic in Schedule I or II drugs from making such deductions on their tax returns.