I wrote up an MFIPPA how-to guide for the City of Ottawa awhile ago. In the event you want to file an MFIPPA with the Ottawa Police Service, here's where you get started:
You can make your request using this form:
To check the status of your FOI request, contact 613-236-1222 ext. 5325.
You may also reach the Freedom Of Information (FOI) Staff by email at: FOIRequests@ottawapolice.ca
I haven't done an MFIPPA to the police yet. But if I do I'll update this post.