I don't see a thing "slimy" about the witness. Am I missing something? He just seems like a young man telling the truth about what happened. If he wanted to really make her look bad and truly was slimy, he would have said they had hot and steamy sex. I am not seeing slimy.
I do not see slimy either but something is amiss, he does not seem to re-call many things, really if you changed the license plate/fixed it is something you would remember, I know I would if I did.