Here is a sample letter you can use
[Name of Custodian of Records]
[City, ST ZIP Code]
Dear [custodian of records]:
I am requesting an opportunity to inspect or obtain copies of any and all information that you have concerning any investigation that I am a party to
If there are any fees for searching or copying these records, please inform me if the cost will exceed $______.
I would request a prompt response to this request. If you expect a significant delay in responding to or in fulfilling this request, please contact me with information about when I might expect copies or the ability to inspect the requested records.
If you deny any or all of this request, please cite each specific exemption you feel justifies the refusal to release the information and notify me of the appeal procedures available to me under the law.
Thank you for considering my request.
[Your Phone number]
I know that your personnel records are not Public Information. But you can use the letter to help formulate one for your needs.