A federal search warrant forced the state of Oregon to turn over some medical marijuana records, the Seattle Post-Intelligencer is reporting.

The state, which administers and keeps all records of medical marijuana users, tries to keep card holders' identities private, the online paper says. 

Since pot is still illegal federally, medical users are afraid they may face some retribution. But the feds say that medical marijuana growers are also selling their bud on the black market.

From the story:

The warrant was executed in November of last year against the Oregon Medical Marijuana Program, the state agency that administers the Oregon Medical Marijuana Act, voted into law in 1998. As part of an investigation into growers in Oregon suspected of dealing on the black market (the PI doesn’t name suspects in investigations unless they have been charged with a crime), a special agent with the Drug Enforcement Administration obtained the warrant to aid in his investigation. “I know that in order to effectively pursue this investigation,” wrote special agent Michael Gutensohn in his application for the warrant, “I need to investigate each of the patients, growers and caregivers associated with” names discovered in the investigation. “I have probable cause to believe that records from the Oregon Medical Marijuana Program will contain evidence and instrumentalities of marijuana manufacturing and trafficking and conspiracy to commit marijuana manufacturing and trafficking offenses,” he wrote.