Although Yoichi Shimamoto was charged and sentenced to 18 months' probation, the couple contend that United Airlines ultimately was responsible for his violent outburst, according to the lawsuit.
United's "conduct was egregious because it knew or should have known that over-serving a passenger alcohol on an international flight would have negative consequences," the complaint said. United's "conduct was deliberate, reckless, intentional and done with disregard for plaintiffs and all passengers."
