In this Nov. 3, 2011 file photo, US actors Johnny Depp (left) and Amber Heard arrive for the European premiere of their film, "The Rum Diary," in London. (AP Photo/Joel Ryan, File)
FAIRFAX, Virginia: Actress Amber Heard asked a judge Thursday to dismiss a $50 million defamation lawsuit her ex-husband Johnny Depp filed over an op-ed about domestic violence she wrote in The Washington Post, and provided new evidence toward her allegations of abuse.