AP photo Arlo Looking Cloud, 49, of Colorado was arrested Monday in the 1976 murder of Anna Mae Aquash, a native activist from Nova Scotia. Anna Mae Aquash: Shot in the head in 1976. Twenty-seven years after Nova Scotia native Anna Mae Aquash was murdered on a South Dakota reservation, a homeless man in Denver has been charged with killing her. Arlo Looking Cloud, 49, of Aurora, Colo., was arrested Monday in Denver and pleaded not guilty in U.S. Federal District Court to committing first-degree murder in the perpetration of a kidnapping. Ms. Aquash's frozen body was found on Feb....