They went for a hike and never came home. Strangers find Mary Cooper, 56, and her daughter, Susanna Stodden, 27, dead on Pinnacle Lake Trail in Washington State. They’ve been shot in the back of the head. Was this a random attack or were they targeted? The investigation can’t identify a single suspect and the case has grown cold, leaving their family grieving, with no answers. Can you help solve this mystery?
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