The Bear Brook Murders, also known as the Allenstown Four, is a chilling case involving the discovery of four unidentified female bodies in a New Hampshire state park. The investigation, which unfolded over several decades, presented numerous challenges as authorities struggled to piece together clues about the victims' identities and their connection to a shadowy figure. Along the way, breakthroughs in forensic technology, including a groundbreaking method, would eventually shed light on the mystery, revealing shocking truths and leading investigators down a path they never expected. The case’s resolution opened the door to solving many more long-unsolved mysteries—though some questions still linger.