The facts of the crime shall be discussed with the prisoner to assist in determining the extent of personal culpability. The board shall not require an admission of guilt to any crime for which the prisoner was committed. A prisoner may refuse to discuss the facts of the crime in which instance a decision shall be made based on the other information available and the refusal shall not be held against the prisoner. Written material submitted by the prisoner under § 2249 relating to personal culpability shall be considered.