From AFB:
I hear from lawyers I respect that Dr. Black is normally a well-organized and capable expert witness—I’ve never worked with him, or seen him work before, I don’t think—but this performance doesn’t strike me as all that organized and capable.
He only had a brief segment less than five minutes long to deal with, and only about 5 or 6 seconds of meaningful sequences - what can you expect from one with such limited data?
What specifically didn’t you like about his evidence?
Dr. Black may have been brought into the case on very short notice. If so, one would not expect his presentation to be as polished. The defense may have a limited budget and Black worked within those constraints.