In this interview with the Hamilton Police Chief, he says there are 2400 to 2500 people who go missing in the city each year and "
We have the same procedure, the same response in all cases. And it's just the evidence that presents itself that causes us to escalate the investigation, or take us in the direction that we need to go. It's the evidence that guides us."
http://www.chch.com/web-extra-glenn-de-caire-interview/ (start watching around 2:00)
He goes on to explain that when TB didn't return from a test-drive, they had an empty driveway, and a wife and daughter who were concerned about his whereabouts.
In LB's case, I think (hope) TPS may have acted differently if she was living at home, went out for some milk or something one night, and was reported missing immediately by her family after failing to return. The fact is she had moved out of her parents home and had been staying with various friends and a hotel, and there was no definitive missing date or event (sounds like she stopped contacting friends at different times). I'm not even sure if a judge would have signed a search warrant/production order for phone and financial records based on that set of circumstances?
What is the case you refer to from December? Did they ever find the man?