Norway overhauled their prison system in the late 90s, and their per capita mass shootings since then far outweigh the US.
They're at like 20x the US for 2009-2015. Even if you do the total rehabilitative 20 years or so of data they're at least 4x worse than the US in per capita mass shooting.
A single point of data in Norway makes it the leader? As stated in the article, this is clearly a failure of statistics more than a proof that the US is OK.
