By Darryl Greer The Canadian Press In Halifax, Denise Pictou Maloney says the trauma and grief from the 1975 murder of her mother, Indigenous activist Anna Mae Aqaush, has never dimmed. Pictou Maloney was nine when she last saw her. In Vancouver, Naneek Graham vividly remembers American FBI agents visiting her family’s home in Yukon in the 1980s to threaten her father, John Graham, with prosecution if he didn’t co-operate with the murder investigation. Thirty-five years after the killing, Graham, a member of the American Indian Movement, was convicted of murdering Aquash by shooting her in the back of the head in South Dakota. For decades, the two families on opposite sides of Canada have been unwillingly bound by the legacy of the murder that rocked the Indigenous movement 49…