well it depends on how far down the rabbit hole you want to go, but if enough neighbors have security cameras in the area, and you suspect they are no more than a few KM away, you can track them,
Main point is you need at least 1 camera per street, or if the routes are limited, 1 camera per route, you have the rough times, so you drive up the road until you spot someone with a camera, ask them if they would be willing to share the footage between X and Y time, if they are willing, and lock in or rule out what way they continued on,
Seeing as they are hitting the same places, they probably stick to a rather predictable route, so you may be able to figure out what direction they are coming from each time,