I'm just theorising how AI could be used, but consider the situation where someone makes a complaint, but doesn't remember the exact time of the incident (say they remember it was within a six hour time frame for this example), or what the officer looked like.

You have (for example) 20 officers on duty it could be potentially be, in a six hour time frame, that's 120 hours or 5 days of footage. An AI can use facial recognition to find the complainant within minutes.