It is much more likely that the police changed a bit on how they report things than that the population at large changed. The real changes gets lost in the nois

It is much more likely that the police changed a bit on how they report things than that the population at large changed. The real changes gets lost in the noise of police reporting changes. Police reporting changes not just via bureaucratic decisions but also the feelings of the police force in general because it is the people at the bottom that decides what to report, which is very fickle and can change quickly with reasons like "we catch thieves but they just get released, so we stopped caring". Covid likely changed crime rates, yes, but it likely changed police reporting rates much more. That goes for all kinds of events. Saying crime is down since police reporting is down is like saying that kids learn more today since they get better grades today than 10 years ago. Edit: You get much better numbers by asking people if they have been robbed lately, or asking stores how much gets stolen.