Hi, I have been lurking on this site for awhile, but decided to join to provide my insight on this topic.
As a former cop I understand where the author is coming from in writing this. First and foremost, the author does specify the need for the appropriate training. Last time I checked, chest decompression needles require MPD approval to even purchase yet alone use.
Events such as Columbine and 9/11 have scared us. Law enforcement has moved into a mindset of we can't rely on EMS anymore. No disrespect to EMS, but Scene Safety is important. We can't expect EMS to enter scenes that would endanger them, thereby making the situation worse.
Many Police Departments have encouraged officers to get advanced medical training. Usually First Responder or EMT, but sometimes even Paramedic - which is common on tactical teams. Departments which may have a lengthy response from EMS or a high crime rate would likely have more officers that are trained as medical providers.
The intent is to not replace EMS, but to provide immediate, life saving care in a high risk situation. Columbine was a learning experience for the entire country. It was very clear that the Teacher could have been saved had a SWAT Medic gone in. There was also speculation that some of the students might have been saved as well. However SWAT Medics were virtually unheard of at the time. Exception being NYPD's ESU and LAPD SWAT.
The author of the article is a cop and it was written for cops. Certain assumptions have likely been made about the viewership of the article. Most cops know what they are allowed to do and not do. Therefore, the need for ALS level training isn't stressed when mentioning Chest Decompression.
Many companies sell tactical medical kits for police officers. This is just one kit sold to tactical officers:http://www.galls.com/style-TK115-general_catalog-north-american-rescue-storm-operator-kit
Some SWAT schools even teach ALS skills now. Needle decompression is taught in the military and can be taught rather easily. Keep in mind, this isn't a medical need for decompression. Rather it is a trauma need, usually involving a GSW.
I have never personally gone through this level of training when I was a cop. I am a Basic now, having changed careers. I can tell you that here in WA State, police officers are allowed to obtain MPD permission providing they meet the training requirements. WSP is the only agency I can think of that would provide care above basic first aid / CPR.
I have never seen, nor heard of, any officer in this state carrying ALS level equipment. Even most SWAT Teams use a Doctor rather than a Medic.
Hope this clears it up.