The letter requests police permission and assistance for the event and provides the chairman's contact information for any additional details needed. Write a letter using a pen and paper and mail it using the USPS mail service.Go on line to your state, look up the Department of Public Safety. This page provides easy access to the Township's most requested applications and forms. The first step in the SUP process is to complete this Application package and return to SPS area Superintendent. In order to ensure adequate time for SUP. The letter should, straight up, say "I'm innocent of the charges pending against me because". And then give UNVARNISHED facts that support your claim. Mail to: Police Formal Complaint 1 Aloha Ln Hinsdale, IL 60523.