If their happened to be a Target you might be in luck, they have some pretty insane surveillance, I saw them pull someones credit card number off a camera that wasn't even zoomed in and it was like crystal clear, Target even has a forensics division...that was back in '07 too....but I'm betting any nice mall should have surveillance cameras. So see if you can get the tapes! Its fun to play investigator and you have good cause to do it.
There was a target right outside where I helped her out, haha but I doubt they have similar surveillance. It's Canada after all