I think it is difficult to separate the unauthorized emails from the others. If the emails were sent to the member's email account, they become the property of the member. In my opinion, the response of a committee like this one to that kind of situation is comparable to a court's response. You ask the member to provide the documents and they have the right to refuse, but the committee may draw negative inferences against a member who didn't want to provide it with the documents. The member may still keep the documents, but there is a risk in that, because the committee may draw negative inferences against the member.
On December 9th, 2010. See this statement in context.