Police in the US originated from slave-catching militias and bounty hunters and developed from there as a means of oppressing, controlling, and re-enslaving (through convict leasing and prison labor) black people after slavery formally ended. At no point has preserving the lives, dignity, or well being of these people been a priority of police forces. All of this gets extended to anyone considered “other” or marginal from the majority.
Prison labor is big business in the US today and acts as a way of reducing the power of labor. This depends on a steady stream of new inmates, so capital pressures legislators and police departments to pass harsher laws and policies and ignore deescalation.
I know nothing about Norway, but I urge you to research how your police treat immigrants, indigenous peoples, and anyone else considered “other” in your society, compared to the majority. it won’t be like American cops, but i wonder what you’ll find.
There are many syllabuses available about the history of police and prisons in the US. if you want a real answer, try some of the materials here: https://www.aaihs.org/prison-abolition-syllabus-2-0/