at it again? >> well, we knew a lot more about todd winkler at this point. we knew a lot more about how he goes about getting what he wants. >> reporter: the more she learned about cathy winker's death the more it seemed to her that todd must have planned it all. just as the evidence here in california was telling her that the killing of rachel winkler more than a decade later was a case of history, todd winkler's history, repeating itself. but if she had some crusading idea of finding justice in that old case, and using it to solidify her own here in california, she'd have persuade a judge, first. coming up -- disorder in the court. >> this is a case about a mastermind, a manipulator, a murderer. >> when "dateline" continues.