Amber Frey

But just a few weeks after Scott told Amber that he lost his wife, Amber says a friend of hers alerted her to Scott's true identity. "I had received a phone call from a friend of mine, that he'd found an article about a Scott Peterson that he thought might be the Scott Peterson that I was seeing…but he couldn't be 100 percent [sure] yet."

Shortly after that phone call, her friend confirmed it, and Amber says she immediately contacted the Modesto police. The call was the beginning of Amber's pivotal role in the Scott Peterson investigation.