As far as I can see on Google Maps: at the end where they turned onto the path, there is a camera on the other side, but it looks straight at the road after the bridge. If they were only captured by the camera that is a little further inside the bridge than where we saw them the previous afternoon, at night they would only be visible as moving spots on the path from that distance. I don't dispute that this camera is looking at the path from the other side of the bridge. I don't know if the city has installed new cameras since then, maybe ones that can see 360 degrees. I didn't include the cameras that take in the sidewalk and definitely recorded them. I'm not sure that they turned onto the path based on the cameras.