By Chris Roberts
Thu., Nov. 29 2012 at 7:03 AM
They know what you did last summerMaybe its the helicopters flying overhead from April to November, or maybe its their cash crop. Whatever it is, marijuana growers love rumors. And a big one — that the United States attorney had convened a grand jury, and was poking around state-legal medical cannabis operations, looking for crimes to prosecute — has turned out to be true.A federal grand jury has subpoenaed the Mendocino County sheriff, requesting all records related to the sheriffs defunct marijuana licensing program, according to the Ukiah Journal.