I hope these jurors focus purely on the evidence that his DNA was found on 14 of her body parts and also clothing. That all this is about. Nothing the defense used was proved. It was all talk. If anyone on that jury has any doubts and they believe the only other explanation offered that TM was responsible, then what was her motive?
That special defence has caused him huge problems the way I see it. I can see why he had to say it because it attempts to explain his semen/DNA being found but it's so unlikely as you say that it's a terrible completely implausible defence.
Accusing another man would have been more likely to sound plausible but it doesn't explain the semen being found.