Johnny Depp told the High Court he could not have punched Amber Heard repeatedly in the face as he had a cast on his wounded finger at the time.The 57-year-old actor suffered a severed fingertip while filming Pirates of the Caribbean in Australia in early March 2015, and needed surgery in Los Angeles for fractures to the end of the exposed bone.Heard, who claims she suffered repeated bouts of domestic violence during her marriage to Depp, has alleged the star attacked her on March 23, 2015.Depp