They need training. They have not had CPR training in over 3 years then, as this new method has been taught for longer than that. Our local village cops all have first responder training and know better. I even know one EMT who has a save in a Walmart without giving mouth to mouth.
You are right about that. It was found to be more beneficial to keep up the compressions. (EMT’s used to train to “Staying Alive” by the Bee Gees, or so I’ve heard)