Notwithstanding sections 44-04-18 and 44-04-19, all records and proceedings of a critical incident stress management team in connection with its critical incident stress debriefing activities are confidential. The records and proceedings are not subject to discovery or introduction into evidence in any action or proceeding involving the emergency service personnel in attendance at a debriefing and which arises out of the matters that are the subject of the debriefing. No person in attendance at a debriefing may be required to testify in any action or proceeding as to any evidence or other matters produced or presented during the debriefing. Information, documents, or records otherwise available from original sources are not immune from discovery because they were presented during a critical incident stress debriefing. Any person in attendance at a critical incident stress debriefing may testify as to matters within the person’s knowledge, but the person may not testify about the specific events that occurred at a debriefing.