I don't know anything about this incident, and will not comment on such.
I just wanted to point out the number of shots fired here from 7+ individuals is not unusual in the slightest, and is not an argument point that should be used to convince anyone of anything.
Too often uninformed folks throw around the number of shots fired as-if it means incompetence/maleficence/or worse. It rarely if ever does.
EDIT:
Allow me to add an edit here since no one seems capable of understanding the nuance in my original post above.
DO NOT Use round count as an indicator of anything, or as a cornerstone for an argument. You will be trying to imply something that is just flatly wrong, and it will reduce your argument to being an uninformed person.
DO Focus on the facts of the events and ensure outrage is placed where it should be. Round count is not it.
With that said - allow me to further clarify my original disclaimer. Should the events of that day taken place? From my uninformed opinion (having only read the above quote) - no, they should not have.
In summary, don't quote round counts like it means something. It doesn't, and it only serves to make you look uninformed.