There is much concern about the militarization of police departments and I'm right there with people on that when it comes to many routine things. However, this was a situation where some of the more military assets (bearcat, robots, EOD teams) worked out quite well. I'm digressing.
Still, a neglected area where the police could use more "militarization" is on firearms and basic combat engagement of multiple opponents. If they are going to have guns and be out there on the street expected to use them as part of a job, they need to know how to engage with them in the safest way possible for the benefit of all involved, especially bystanders. Sure, maybe some of these cops are well trained and really good but the vast majority simply are not good shooters from my observation. Some can barely operate their glocks and get confused by any other platform. These are the same people we are throwing out on the streets to have at it with any suspect who is crazy enough.
The attention paid to firearms training in PD academies is severely lacking as is an emphasis on improving skills and staying sharp while on the job. I also believe all police should have and be well trained (no such "well trained" condition formally exists right now) on an AR platform. It should be ready and accessible in the cruiser. The problem is those 2 things are mutually exclusive, they will never agree to proper training so we can mitigate the risks of them killing somebody but they will want them. Endless loop. Maybe they should start realizing that double time and a half for going to the range + dept supplied ammo is nice to have but not a necessity. Spending a bit of your own time and, gasp, money could save your ass and the asses of your fellow LEOs and citizens alike. Pigs will fly before this mindset comes to MA PD's.
This may sound a bit sheepish in implying that CCW holders should be regulated and trained but I disagree with that stuff entirely. There is a difference between carrying in a defensive scenario and being expected to use one as part of your job. If this was indeed friendly fire, you can likely thank the lack of coherent firearms and close quarters combat training. If I was still a cop, I would not care necessarily about beating the opponent in such an extreme case but making sure more are not lost by friendly fire would be paramount while saving my own ass. Some things are best playing defense and waiting for SWAT.