I think the SD is blowing smoke also, but it is very unethical and unprofessional to do these things and I can understand why you are upset.
I would not only write up the notes, I would send them as a Memo of conversation to the investigator....reports get delayed, etc. Keep it friendly since the investigator was positive; then as I just wrote in another post, unless the investigator corrects you in writing, your memo stands as uncontroverted evidence of what transpired. If you do this, I bet the investigator will use your memo to write the report. Send it CERTIFIED.
At a minimum, investigators do not have time to write their own Memos of conversation, so I bet you will not get a correction.
Best to you,
Martie