To prepare for this meeting :

1. Reread your complaint and, if applicable, note any details you would like to add.
2. Find all the evidence that can support your complaint (e.g. ticket, photograph, video, document, etc.) and prepare a copy (e.g. on a USB key for photographs and videos).
3. Make a list of your witnesses with their up-to-date contact information (phone number and email).
4. Inform your witnesses of your complaint and that they will likely be contacted to provide a statement. If one of your witnesses is a minor, a person who has parental authority over him must give his consent.

When you meet the investigator, you have the right to be accompanied by a person of your choice. However, this person should not be involved in the event you are complaining about, as they may also be met as a witness.