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b'After nearly 14,000 interviews and over 1,300 leads, the investigation into the murder of Valerie Percy went cold by the early 1970s. But an investigation by a journalist and a tip from a concerned citizen led to an array of theories \\u2014 including a possible mob hit, and a violently obsessed neighbor.\\nLearn more about your ad choices. Visit podcastchoices.com/adchoices'