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Audra Soulias (search), a 28-year-old Chicago woman, claims in a lawsuit that William Kennedy Smith (search) sexually assaulted her in 1999. Why did she wait until now to come forward? Greta gets answers from Kevin O'Reilly, Soulias' attorney, and private investigator Paul Ciolino, who gave the accuser a polygraph test.

Also, was Scott laughing about Laci’s disappearance? Don’t miss the latest shocking details coming from the Peterson (search) double homicide trial in Redwood City. Could new tapes sink the defense? Greta gets to the bottom of it with the legal eagles.

That story and much more...

Don't miss "On the Record" tonight at 10 p.m. ET.