There were a couple of articles in the NYT and WP shortly after that tried to get into the question of police training in whatever the suburb is called (St Anthony? Isn't Minneapolis supposed to leave the Catholic names on the other side of the river?). As Rand will surely point out, they come from the leftie mainstream media so take them with however much salt you please. The Times article suggests that some of the cop's recent training may have included some tactical sessions based on a warrior outlook. The WaPo article, misleadingly titled, is purely anecdotal (anecdote of one person) and speculative. So it's something but not enough to build a case around.
https://www.nytimes.com/2016/07/15/u...uestioned.html
https://www.washingtonpost.com/news/...=.81bf0f6fe41a