I still have disgust for KK, but in a weird way, this last witness could help give her credibility in the jury's eyes. In other words, he validates that she was right to be scared of PF. If the ONLY thing the defense could try to attack was her credibility (even though the EVIDENCE matched everything she said), well this dude just kind of helped make her a slightly (vom) more sympathetic character. Not in terms of her actions or that she isn't still despicable. But you can now make a case that she had reason to be terrified of this guy. Which I think helps the prosecution even more.