Brilliant info. Like everyone I will leave my 2 cents. Love the knowledge that the recording is starting off the dial......very useful! Now the advice to state "Theres been a shooting at...." and hang up. Personally I would recommend following up to ENSURE that the person understood you. I would also add a phrase....albeit I see why you want it short and sweet. But I would say "Theres been a shooting at xyz I need EMS asap. I will be doing what I can until they arrive.
Please confirm you understand. Once they confirm. I hang up. This makes me appear not guilty but trying to do what I can in the way of possible first aid or watching the subject to make sure they dont run etc. I can fill in the blanks later. I know my routine.....Shooting at XYZ. Send EMS. Doing What I Can. Click.
This makes me look honest, conscientious, and helpful. In a perfect world the 911 operator repeats back the confirmation.....if not interupt and say "Do you understand there has been a shooting at XYZ?. When they say yes....say SEND EMS. Hang up. You must push yourself away from the gangbuster of questions they will want to throw at you. Be forceful. Not everyone has this ability....thats why this Lawyer is recommending you just make the statement and hang up.
My only fear though is that there was an audio issue or misunderstanding.....I want confirmation before I put down that phone...UNLESS the situation is too dangerous for me to drag it out of the caller. If so I just hang up. Again I'm no expert....know all your local state federal laws and consult a LAWYER....not me....just throwing out good entertainment for all.