UnitedHealthcare is suing The Guardian for defamation over a story the publication ran related to its billing for nursing home residents. In a May 21 story, The Guardian alleged that the healthcare giant saved money at the cost of nursing home residents' health. In a lawsuit filed on Wednesday, UnitedHealthcare said that The Guardian had knowingly published false information, and tried to capitalize on media interest in the killing of its then-CEO last year in New York. The healthcare company alleged that The Guardian cropped screenshots quoted in the article, taking the email out of its full context. It further disputed some of The Guardian's characterizations of medical events in the story.