So glad someone else saw this, I'm not finding anything on it and I'm starting to question my own memory, as I'm quite sure I saw the original article about the Mexico program on this site.
FWIW, I also recall the tech being originally used to find people who planted IEDs in Afghanistan.
I'm kind of shocked about how all the articles I am finding seem to emphasize real-time police chases.
I first heard about this on Radiolab. Maybe you heard it there too?
>> In 2004, when casualties in Iraq were rising due to roadside bombs, Ross McNutt and his team came up with an idea. With a small plane and a 44 mega-pixel camera, they figured out how to watch an entire city all at once, all day long. Whenever a bomb detonated, they could zoom onto that spot and then, because this eye in the sky had been there all along, they could scroll back in time and see - literally see - who planted it.
I'd rather think it's because Google sucks now, and those keywords just bring up too many similar articles, but my metaphorical tinfoil hat is my hands.
Your tips got me to this one, where it more clearly spells out the "rewind" capability. I think the problem was that the tech was attached to a low-flying, piloted plane, not drones.
There was a website shown on HN a few years ago that used AI and plane transponder data to find circling planes which were presumably doing this kind of surveillance over American cities. It might have used further parameters to narrow it down, e.g. “over a city, circling for >3 hours” to rule out planes waiting to land. I thought it was named something simple like “plane-circles.com” but I’m not having any luck finding it again.
There have been a few products that record everything you see on the web, so you don't have this problem. Obviously analogous to recording everything you hear.