Autopsy: Natasha Richardson died from hitting head

FILE -- In this Oct. 3, 2000 file photo, British actress Vanessa Redgrave, center, poses with her daughters actresses Natasha Richardson, left, and Joely Richardson as they arrive for the opening of the "Typically British" exhibition at Pompidou Center in Paris. Natasha Richardson, 45, died Wednesday March 18, 2009 in New York after suffering an apparent head injury from a skiing accident in Canada on Monday. (AP Photo/Michel Euler, file)