@mystery-ak I read the protocol, and it says when a deputy has on site intelligence someone is shooting inside a building, he may go in without waiting for other deputies and does not need approval from sheriff's department to go in. It also does not REQUIRE the deputy to go in. Deputy has to decide to go in or not go in.
I want to say about Emergency Medical Services, the EMTs, by protocol CANNOT go in a building unless it has been determined to be safe for them - dead EMTs cannot help patients. This was drilled into us who became EMTs.
emergency call along with EMS?
An aside: Why do police and firemen arrive at a medical emergency along with the EMTs?
Police assess situation to determine safety for EMTs before entering. It is the firemen's duty to get the patient to the EMTs if the patient is locked in a room, stuck in a bathroom where EMTs can't get to patient, take/extract patient downstairs, etc.. Firemen have equipment EMTs don't have, so Firemen have that duty. EMTs do the medical work; they cannot be police and firemen, too, at a location.
When I lived by myself, family wanted me to wear one of those medical things on a necklace so if I fell, I could punch the button and EMTs would come to the house. One day the button accidentally got punched and I didn't know it. It was night, and suddenly someone was banging at my front door. It was the police, firemen, ambulance - it looked like Christmas out there with red/blue lights everywhere on their vehicles. They were ready to charge inside my house to save me. I apologized to them and felt awful that happened.