It is pretty common for police to have first responder training, as they are often literally the first to respond to medical emergencies by dint of already bein

It is pretty common for police to have first responder training, as they are often literally the first to respond to medical emergencies by dint of already being in the area. OTOH, if you are responding to a scene where someone's head is bashed in, there's really not much point in attempting CPR...