forward for an traffic accident she blames on ambien. here's linsey davis. >> reporter: despite a request by her lawyers to have it dismissed, for now kerry kennedy's drunk driving case is moving forward. kennedy, daughter of robert f. kennedy, was arrested in 2012 after state police say she swerved her lexus into a tractor-trailer on a new york highway and found slumped over the wheel of her car. she told investigators she only remembered getting on the highway. >> and then i have no memory until i was stopped at a traffic light and a police officer was at my car door. >> reporter: she told police she may have taken the powerful sleep aid ambien that morning after mistaking it for her thyroid medication and then getting behind the wheel. ambien carries a warning against taking it and then driving. >> basically, your brain is shut off but your body is moving. >> reporter: so you would be just kind of driving but almost as if you're a asleep? >> in a hypnotic trance state,