So this might be true for things like increased patrols for drug crimes as an example, but this doesn't apply to shootings. Shootings get reported no matter where they are. When someone shoots a gun in a wealthy part of town, it's not going unreported... Shot spotter simply allows for an instant report instead of having to wait for a phone call. Wealthy areas aren't getting away with more shootings just because of less patrols.
As per the article, they're also using the microphones to record private conversations.
> Conversations recorded by ShotSpotter sensors have twice been introduced as evidence in criminal trials. In one case the court allowed it, in another the court did not.
Even in cases where they're not used at trial, they're still used to generate suspicion. I don't know if you've ever had cops on your ass, but it's super stressful, and can impact your job (because they start harassing you at work and you get fired). Depending on how much of a dick the cop is, he may just arrest you for shit and giggles, and now you have an arrest record that fucks up all sorts of things in your life (he's got qualified immunity so what does he care).
This basically amounts to pervasive harassment of a community, and the more surveillance there is, the worse it gets, the less the locals will trust or cooperate with police, the more "us vs them" it gets between citizens and police, the more heavy-handed police response becomes, the less likely people are to solve their differences using the police, the more chaotic a community becomes. This is what oppression looks like.
