All of the city's CCTV footage has been obtained by Louis. The movement of his eyeballs paid attention to all the personal data of all the people displayed by the blue chips on his flat screen pad.
The reason Ella had been in the shopping mall for so long still made sense. But Louis didn't fully believe it. He looked for a way that might be from the back and left or right of the mall location that Ella could use to escape, through the application's map. And sure enough, there is a shortcut to the exit through the back. Louis asked again for the CCTV footage that was there but before long--
"Damn it! What's going on, Ella!" he shouted. He stood up and walked stammered. The electricity suddenly went out and the whole city was pitch black. This is rare and seldom happened before. One of those rare things.