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this post was submitted on 14 Feb 2024
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The ACLU had a pretty good article on it a few years ago. It seems the inaccuracy comes from the number false positives and the resulting aggressive police response.
The system probably works great in military situations, which I believe is what it was designed for. In a dense city where sound can echo multiple times off various buildings and other structures? It probably gets things wrong quite often. Add in trigger-happy cops that don't know how to interpret the data and you have a recipe for disaster.
they have this in DC… coincidentally the day with the most “gunshots” is also the 4th of July when hoards of people are openly lighting off fireworks of all kinds in the street.
I wouldn’t assume a company like ShotSpotter uses modern machine learning techniques. It’s got a pitiful accuracy rate and the company was founded 28 years ago. They seem more like a company that hires people with connections rather than a company that hires AI experts and buys Nvidia H100 GPUs by the gross.
How TF do you racially bias a gunshot sound? That doesn't make any fucking sense...
Ah okay, so the article as written is just written stupidly. It doesn't seem like the system itself is racially biased, so much as the cops using it.
We actually have a local paper that suffered from what I believe is happening here. Cops give news papers and stuff deeper access to stuff on the regular. Our local paper here wrote something SLIGHTLY negative about one of the cops, and immediately had all their 'press' credentials revoked. They stepped back in line shortly after and issued an apology to the police department...
I'd be willing to bet that's what's happening here. They're toeing the line of saying the racial bias is the cops by making it ambiguous...
Well they are placed in mostly minority communities but above that, a ShotSpotter tech admitted in court that they often change the analyst interpretations of what is and isn't a gunshot at the request of their police department customers which, keep in mind, have successfully been used in court as evidence of a crime.
There is also overwhelming data showing that the majority of their alerts lead to no arrests. The Chicago IG believes this demonstrates false positives where as ShotSpotter (who changed their name after some criticism to SoundThinking) says that people can fire a gun and leave no evidence in spite of police investigating and asking people that would have witnessed it (and there being no victim).
Furthermore, the way it works is that AI 'assists' a human who then determines if it is a gun shot and then attempts to triangulate the position it came from. From the trial I mentioned earlier, ShotSpotter determined that there was no gun shot but then changed the analysis at LEO request but in actuality was proven to be a helicopter....
Furthermore, ShotSpotter keeps the details of its methodologies and models a secret and has refused an independent audit from IPVM.
So with all of that, one could easily argue that ShotSpotter/SoundThinking is as biased as a police officer and that the evidence is purely subjective and non-transparent.
By putting them only in predominantly minority neighborhoods. And I do mean only.
The bias comes in because they installed them in areas with more gunshots, which happen to be areas with more minorities.
By not spending excessively on detectors uniformly distributed across the metropolitan area, they are targeting minorities.
targeting minorities is their whole job and always has been
they just need more microphones & probably a network of cameras on every street corner.