The Cat Vanishes

Luis, a recognized university professor is out of the psychiatric clinic where he spent the last three years, hospitalized after a psychotic episode that led him to threaten his wife and assistant chair. Clinical believe he is healed, but a relapse is always possible. Upon arriving home, Luis is attacked by the pet cat. Soon after, his wife notices that the cat disappeared. Was Luis, ex-crazy, that ended the cat's life in a new psychotic attack of aggressiveness?