perhaps he could try to claim that the reason a fibre from his boxers and/or joggers being found on Alesha's vest is because it transferred to Toni when they allegedly had sex in the shed....and then he said she went back to plant his semen onto Alesha's body...he could claim that whilst she did this the fibre from his boxers which was now on Toni's clothing then got transferred to Alesha's.....
I didn't explain very well but hopefully you know what I mean...
I don't believe this happened FYI, I'm just considering that he might try to claim this..