Q. Was there any blood evidence found on that nightgown?

A. Not that I'm aware of.

Wasn't it his job to know what evidence was found on the nightgown?

This is just another way to say "I don't know."

If he really didn't know - - - what does that say about his "expert" position on this case?

Would any of us been that uninterested in what the evidence was? I really don't think so.