This is a blog blurb from the subscription NJLJ site. "A law firm defending itself in a legal malpractice case took an unusual tack: trying to avail itself of the plaintiff’s expert — Fox News commentator and former state judge Andrew Napolitano — while trying to impeach his ethics history."
It looks as if defendant called plaintiff’s expert as a fact witness, and then tried to branch out and sully his upcoming expert testimony.