Darn! I was hoping to stay shy and not talk to real people about my questions.

Because I now live in a big town in the Midwest but the story happened in a small town in Eastern Canada, I unfortunately can't just visit or show up with brownies. Wish I could! I suspect that would get the quickest response. However, I finally did get the time and nerve to make a phone call to the police.
I've also sent an email to my dad who still lives in my hometown. If he could get me a specific name, that might also speed up the process.
Since that time, I have also contacted a representative for my home town's search and rescue. I've received some brief answers and an invitation to call for more details. I'll also ask him about a police contact.
And even though I agree that talking to real people is best, I have continued to look for police procedural info. I finally found some booklets put out by the Royal Canadian Mounted Police about missing child investigations.
To provide some further information, my town has about 15,000. The child was only about kindergarten age, but had trailed after some kids in elementary and high school. That's about the extent that I plan to stick to the original facts. However, all of you are right that I need to get facts from the people who really know.
Thanks everyone! I'll post an update, if I make more progress.