I've read over and over again that intelligence is a disqualifying characteristic for being a LEO. They want people to follow orders and be a good partner (e.g., never go against what your partner says).
My experience in CA since the 80's is that LEOs are very corrupt and really only care about their own. There are exceptions. I live in an unusual city, LEO-wise, but it is totally not the norm.
This went to court and the man who sued for discrimination lost his case.
> -- A man whose bid to become a police officer was rejected after he scored too high on an intelligence test has lost an appeal in his federal lawsuit against the city.
> The 2nd U.S. Circuit Court of Appeals in New York upheld a lower court’s decision that the city did not discriminate against Robert Jordan because the same standards were applied to everyone who took the test.
Smart, well-educated police are how you end up with Frank Serpico[2]. Most police forces don't want men like Serpico on their forces.
[1]: https://abcnews.go.com/US/court-oks-barring-high-iqs-cops/st...