Lisa Ling and Kent Whitaker

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After her hour-long interview, Lisa says she couldn't be sure if she met the real Bart. "My sense is that he still doesn't know who he is," she says. "I think that for years he was deceiving everyone, even the people closest to him. He started living this lie, and he no longer could make a distinction between what was a lie and what was reality."

Kent says he thinks he knows his son better than he did before. "I think he's changed, but I don't know that he has," Kent says. "I can't truly read his heart. I thought I'd read his heart for all these years."

Because Kent has been able to forgive Bart, he says he has moved past trying to analyze Bart's statements. "My love for him and my forgiveness for him isn't based on him changing," he says.