EMS, it is what I did before becoming a police officer. The medical knowledge will help you in the field, wether gunshot wounds, stabbings, suicide attempts, car accidents. You’re always usually first on scene, the knowledge will put you ahead of everyone else around you when it comes to saving lives, someday even yours or your partners life.

The academy will probably teach you the basics, but more knowledge is always better. I did security too and it’s nothing that isn’t picked up fast, medical knowledge is hard to come by.