The woman who killed eight people, including herself, when she drove her minivan the wrong way on the Taconic Parkway was a heavy drinker and frequent marijuana smoker, the woman's sister-in-law told investigators. Despite her husband's repeated claims that his wife wasn't an alcoholic or regular drug user, Diane Schuler's in-law revealed to police that the 36-year-old "was a hard drinker" who "used marijuana daily because of the fact that she didn't believe in doctors," according to an attorney