Name one more western first world country besides the US, where cops shooting someone is hardly news. And no, the problem probably isn't guns.
In the US there's about 1 gun per resident, Germany 0.3, UK 0.06, and Canada 0.3. Meanwhile there were about 987 fatal shootings by cops in the US in 2016, compared to 13 in Germany, 4 in the UK, and 9 in Canada. Even adjusting these numbers for population and number of guns per resident, you will still be off by an order of magnitude.