Alberta Kelly, 67 of Uniontown, PA was acquitted of drug possession and manufacture charges after she told a jury that she didn't know the 4 foot tall weeds growing next to her tomatoe plants were marijuana plants and that she had planted what a bearded stranger in a pointy hat told her were flower seeds...

http://www.washingtonpost.com/national/pa-grandmother-cleared-of-growing-pot-after-saying-she-was-duped-bearded-strangers-seeds/2012/01/06/gIQAUbPieP_story.html