They don’t convict based on the video or whatever. They learn their patterns and catch them the next time they come in and steal. Loss prevention associates know most of the usual suspects on sight.

Learning patterns doesn't get you a court-viable record of what they steal over multiple visits to push them over a specific money threshold.

So the most the gait-tracking computer can do is alert that a flagged person might have entered and needs to be strongly identified in some other way. But if loss prevention already knows them on sight then that system is minimally useful.

I expect the thieves are in and out before loss prevention even shows up, especially if they are masked up. Think about it logically: if loss prevention was able to actually work, they wouldn’t have to put so much merchandise under lock and key in high theft areas.