If he's really a good person you should be worried. Good cops get fired if they're lucky. They get killed if they're not

The fundamental reason that people say ACAB is because the people that are trying to do good things still enable the shitty ones. That is, they fail to act when they see shitty cops; the 'good' cops don't police the bad cops, and that makes them, in turn, bad cops themselves, because it allows bad behavior to be normalized. The relatively few cops that won't go along to get along quickly find themselves left high and dry; the get the worst duties, don't get backup in a timely manner when they need it, don't get promoted or end up being demoted, rack up a long list of bullshit infraction of departmental rules, and so on, until they get forced out.

People talk about reforming the system from within, but it's a top-down problem, and the police unions are either directly involved or, at the absolute minimum, are complicit by working to protect cops that the union knows are corrupt.

It depends on your local police department, honestly.

People are products of their environment. If the local police are decent, your brother-in-law may actually be a good fit. If the local police are shit (ie the average in the US), then your brother-in-law will either become fired, immensely stressed, or shit just like them.

We relate a lot of stories about bad cops, and Lemmy isn't the most military-friendly place, but one thing I constantly see repeated by veterans, both those with and without police experience, is how baffling the utter lack of discipline and oversight in US police is. Pointing out that RoE are looser for cops than infantry in active combat zones is common.

Just to get this out of the way, this is why I'm not a fan of the ACAB and similar blanket statements. I get it cops in general have done fucked up things. But slapping a label on all of them is passing judgement on the good ones making a difference. And there ARE good ones and good departments. They don't make national news and definitely don't deserve that kind of shade.

We have cops that have become family friends and one I am now related to. They are genuinely top notch cops. I was heading home and seen them work serious car accidents first hand. They know their use of force and laws well enough that even some local sovereign citizen types gave them some praise in a video they made.

Being an MP going to be a regular cop isn't as seamless as you might think. Laws on a military base and real life differ so sometimes there's issues unlearning the stuff the military teaches as far as procedures go.

For gun stuff you don't need to be John Wick and the military does NOT teach you guns as well as some think unless you clear rooms for a living. Little to no shoot/no shoot scenarios either for most of the mil. But they do teach you solid gun safety and enough medical to make a difference. In most cases lower levels of the use of force contiunuum are going to be used long before a gun anyway so that's where the training focus should be so a gun can stay holstered longer.

Anyway yeah real life is messy and I'm glad people like your brother in law are willing to do unsexy but important work that can expose them to very traumatic things. I hope they serve the community well

Nothing will ever change if only rotten people go into the system. Of course, there's a high chance he will become corrupt himself, but it's a necessary risk.
You can't hope for some higher power to come down and fix things. Nobody is going to magically dismantle the police and form a new one. The best you can do is make the police as diverse as possible, especially in the personality profile of it members.