If you're interested in how a society without police could look like, there's a good book by Ursula K. Le Guine, called " The Dispossessed". If you're interested about more theoretical work on why the police is a problem, you can search for "Abolition" or "Restorative Justice". Especially for the latter there are loads of Videos explaining how to deal with unjust behavior of individuals. There is a ton of theoretical work about how to resolve conflict and harm done without involving the police or the penal system. Its a very interesting subject and just imagining a society without police and penal justice can make for good utopia's to strive for. Maybe it doesn't work, but working towards a society that doesn't need those systems is worth it in any case.

Anyways, hope you have a wonderful day! Cheers