Pamela Hargan was a successful businesswoman and a devoted mother to three adult daughters. The Hargans were a typical suburban family until one day, Pamela was gunned down in her own home and her youngest daughter, Helen, was found dead upstairs. 48 Hours correspondent Peter Van Sant unpacks the web of evidence from the complex case of the Hargan killings, revealing treacherous motives of jealousy and a family fortune.

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