Chapter 233: Sixteenfold Playback, Tracing Ghost's Movements Under normal circumstances, most surveillance footage is retained for about 15 to 30 days. Footage from main city roads, banks, hospitals, police stations, and other official institutions tends to be preserved a bit longer, around three months. Moreover, modern surveillance systems don’t require manual deletion of recordings to free up space; they automatically overwrite older footage. So, for a case that occurred half a year ago, there…