Stepmother. The murderer in the movie "legally blonde" is the stepmother of the deceased's daughter, who had an accident because of love and hate. Legally blonde is a campus comedy film produced by MGM Film Company, directed by robert luketic and starring reese witherspoon, luke wilson, selma blair and matthew davis. The film tells the story of Ellie, a blonde who is proficient in dressing. Because of social prejudice, I was dumped by my boyfriend who was admitted to law school. In order to get her boyfriend back, she was admitted to Harvard Law School and proved her story with actions.