This person, dressed in all-black, looked ready to melt into the dark night. Coupled with the pixelated image of the surveillance camera, all they could see was a shadow following the old man, not more than three meters apart, from behind.
The person's actions could be observed as especially cautious. There was nothing in the person's hands, but when Mu Yazhe froze the image, he noted that the person's pocket was bulging. It probably contained a bottle of sulfuric acid!
The captain zoomed in the screenshot to twice its original size, but the image regrettably grew fuzzier after he did. The quality of the image was so bad that they could not even distinguish the characteristics of the clothes, let alone the suspect's facial features.
The captain could not help grumbling. "This quality of the images from the old camera is really terrible!"