The Keddie murders remain unsolved, despite a thorough investigation that lasted for several years. — On April 12, 1981, the family was found tied up with wire and massacred in their cabin, with no one hearing a sound. Sheila Sharp, who had attended a sleepover and returned home to change for church, discovered the gruesome scene. Her mother, Glenna “Sue” Sharp, her 15-year-old brother, John…