In this case he was speaking as an expert to the jury. I think the real question is who can define who can be an expert to the court. Is it the court or the s

In this case he was speaking as an expert to the jury. I think the real question is who can define who can be an expert to the court. Is it the court or the state that defines the qualifications of the expert. If it is the State who can define who is an expert then the could very well require him to have a license. It is not about what he said but where he said it.