The writer who seems very biased by face and politics does not tell us the entire story and does not tell us Dunn’s side of the story.
How many menacing teens were in that SUV?
How many weapons did they display?
What are the sound and noise ordinances in Jacksonville?
What made Dunn so fearful of his life that he had to escape the danger?
How were they menacing? Why does it matter how many teens were in the SUV?
How many weapons did they display?
Read Dunn's own statement above - there is no indication that any of them had, much less displayed, a weapon.
What are the sound and noise ordinances in Jacksonville?
Irrelevant. You can't use deadly force to enforce sound and noise ordinances.
What made Dunn so fearful of his life that he had to escape the danger?
I'm guessing that Dunn was a drunk idiot.
If they are in the SUV and remain in the SUV, they are not menacing, they are mouthing off.
It’s tempting, but never okay to shoot teens for mouthing off.