WINONA, Minn. — In a speeding stop a Wisconsin driver admitted to just having consumed marijuana, the arresting officer said. The officer already knew it. Haddi Mohamad Tanner, age 29, of Janesville, had the odor of marijuana about her, he said. Tanner then failed roadside exercises for balance and dexterity. This was about 11 p.m. on U.S. Highway 61 at the Vila Street entrance to the Winona Mall. At the jailhouse Tanner provided a urine sample for testing to determine whether formal charges are warranted.