Things are very different in the US. Police do not exist to uphold the law or protect civilians from anything. There are specific rulings in our legal code that flatly state police are not obligated to protect anyone.

Police in the US exist mainly to suck up tax money and harass and murder civilians and escalate peaceful protests into riots to justify suppression and murder. They're merely an instrument of an increasingly authoritarian government.

Yeah, if you gave police here a complaint with all the evidence in the world, there is absolutely no obligation for them to investigate or take any action. And there's really no recourse.

Be glad you live in a functional society.