Equipping all emergency vehicles with defibrillators is important, simply because, in many places, the paramedics aren't the first ones to arrive on the scene in situations of cardiac arrest. In my friend's case, there was a defibrillator in the arena. However, we can assume that police officers are often the first to arrive on the scene when people are located slightly further away from hospitals or from the paramedics' stations, for example, in the countryside.
If we made an effort to study how we could support all the safety agencies across Canada, we could save more lives. Furthermore, I even think that it would be timely to ask ourselves if we should include volunteer groups. Some communities call on volunteers to respond to emergencies. Take indigenous peoples and First Nations, for example. I didn't check, but I'm not sure that all of their vehicles are equipped with defibrillators. We could do something to that end.