[pawelmurias]

I seems reasonable to expect the police force of a country where the populace is heavily armed to shoot more people.

[Clubber]

There has been a downward trend in gun ownership since at least the 1980s.

https://www.rand.org/research/gun-policy/gun-ownership.html

https://www.norc.org/PDFs/GSS%20Reports/GSS_Trends%20in%20Gu...

[eru]

I don't know. Maybe?

We can look at statistics from eg https://en.wikipedia.org/wiki/Estimated_number_of_civilian_g... and compare with statistics on police shootings.