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NEW HAMPSHIRE, 1973: On July 11, 1973, 15-year old Diane Compagna swung her beach bag over her shoulder and headed out the door of her house in Merrimack, New Hampshire. She was off to a nearby lake to swim with her friend, 15-year old Anne Psaradelis. At least, that was the story they told their parents. Neither girl was expected home that night, but their parents weren\u2019t suspicious as the girls left for the day. It wasn\u2019t until the next afternoon when the pair didn\u2019t return to either home that their parents began to worry.\xa0What began as a missing persons investigation for two teenage girls in the summer of 1973 ended in a double-homicide. In 2023, this case will reach its 50 year anniversary without answers.\xa0This is the case of Diane Companga and Anne Psaradelis.