It was a fine garden that Antonio Carrozzi kept. There were tall, aggressive beanstalks. Jungles of pregnant tomato vines. Ears of corn like golden footballs. And out front, placed there to conceal the tempting vegetables from passersby, 300 spindly marijuana plants.
"I didn't even know it could be smoked," Carrozzi said when North Tarrytown, N.Y., police harvested the offending shoots and planted a drug charge on the 57-year-old Italian immigrant. Indeed, Carrozzi, who speaks little English, did not even know it was marijuana. After a heart attack four years ago, Carrozzi testified at...