You've hit the nail on the spot my friend, this is 100% true.

There was a murder case here like 2-3 years ago, and they have no idea who did it, some poor homeless guy was the victim.

I bet they can't find the perpetrator in 80% of the cases, yet the TV show literally reinforces the belief that all bad guys will get punished and caught in the end (which is what you would want as a propagandist to deter crime [which may be effective but still immoral to lie])

However in reality I think barely anyone gets caught, unless it's like a stupid guy robbing a store that gets his face caught on a camera.

But what about the banksters and the other political criminals, do they get caught too? Notice in movies they never show any senator or PM as the bad guy, God forbid a bankster, they are not even mentioned. They even occasionally have a rogue politician like a mayor or something, or even a rogue stock broker like with Wallstreet and Wolf of Wallstreet movies, but never a bank. Wonder why?

Occasionally they do, especially in those older movies, but it's mostly some "lone wolf" or a gangster, but never a bank manager or a corporate elite. Almost like they are saints, which we know full well they aren't.

So it is my guess that in reality the police is inefficient (I mean all government programs are, just look at Cuban Socialist Hospitals) and they never go after the big guys.

But the propaganda is trying to tell us that they always catch the bad guy, and that the big guys are good.

Literally an inversion of reality, that is propaganda!