Friend, I have done Advanced First Aid before where I live. I've refreshed the CPR component many times. Which is the best case for that officer in question's qualifications. The thing with narcan is that, it's not great if you don't need it, but it won't kill you. However, and you're taught this in CPR training, if you perform it on someone who isn't in cardiac arrest, you can cause them to go into cardiac arrest. He literally could have killed her.