Mary Jean Kreiser was 49 when she vanished in the fall of 1987 from the Westlock area of Alberta. Reports differ on the exact month, placing her disappearance in September or October. She was last definitively seen at a Petro Canada station in Westlock after having been living in Slave Lake that autumn.

Born in Wabasca to a Métis father and a mother from the Bigstone Cree Nation, Mary Jean had endured time at a residential school and struggled with depression and alcohol misuse. At the time she went missing she was described as five feet seven inches, slender, with short brown hair, brown eyes, a mole on the right side of her jaw and a tattoo of the letter M on her left wrist. She was last reported wearing a dark blue coat over a blue shirt and a green wool shirt, blue jeans and white running shoes, carrying a black leather clutch-style purse.

She had been living at a local campground with a boyfriend whose history of assault led family members to later suspect he might have been involved; that man died in a car accident in 1997. Leads over the years have included a possible trip to Vancouver but nothing has produced an answer and the case remains open. If anyone knew Mary Jean, her movements in 1987, or saw her at Westlock that fall, please come forward with information.