Except...
They are much, much, much smaller countries, and so...
One would actually expect a much, much, much smaller number for them.
Even combined.
Whether by land area or population, they are considerably smaller.
Population Killed
(mid-2012) by Police
United States 314,102,623 984
England & Wales 56,567,800 3
Ratio 6x 328x
There were 3 shootings vs 984, so that's a ratio of 1:328. So it's still a very valid point.