As usual there is a lot of missing information. Why was even one of them armed, especially working for a private service. Even in a tactical capacity, we aren’t armed. It’s extremely rare for a team medic to be a shooter that isn’t also sworn LE. And usually then it’s someone who has that background like a former SOF medic, became a cop and got sent to medic school. But that’s usually only for full time teams which are just as rare.
I can’t vouch for MA, as I don’t work in state. OEMS, clearly states and outlines that EMS providers can not be armed, even with a knife, and that firearms are prohibited from all Pt care areas, even if it belongs to the Pt. If in violation, they can and will terminate your license and rescind your medical control.
Im betting, their service area is so fvcked up and dangerous, one of them took it upon themselves to carry.