Yes, both parties have a reason to lie.
Yes, not calling cops is fishy on Dunn's part, very fishy.
However, to me, personally, it is more believable that a car full of music-blasting teens/early 20's males, one of whom is a felon, would react in a threatening way to someone asking them to turn their music down... than it is for me to believe a middle aged businessman whose girlfriend is about to come back out of the gas station decides to just unload on a car full of strangers for no good reason.
If that had a shotgun, I have no idea if they had any intention to use it, or if they just wanted to flash it at him to scare him. My personal suspicion is, they egged one another on, within that Durango, over the course of a few seconds they each inspired the other to greater heights of stupidity and shit like "man fuck this white boy, who he think he is?" type shit, until someone, or a couple of someones, in that Durango made the stupid decision to start yelling shit at Dunn, including (most likely hollow) threats on his life.
If there was in fact a shotgun in that truck, or some sort of weapon, someone made the monumentally stupid choice to flash it out the window, again, I doubt with intent to fire... but rather intent to intimidate. IF this happened, we have no way of knowing if it was Jordan Davis who did it. He may have even been the voice of reason in the Durango trying to calm the others down... who the hell knows or ever will know?
It's tragic what happened to him... either way. He doesn't seem to have been a horrible thug based on what I've seen. He may have been making some unwise choices about who to associate with, and some of THEM may have been stupid thugs, though.
I honestly have no idea if they had a weapon or not, but I'd bet you they at least made verbal threats on his life, threats they had no intention of acting on in all likelihood. Was Dunn reasonable in doing what he did in response to those threats, if those threats did occur? I don't know. I would prefer he had backed his car up, pulled over to a different spot, and let his girlfriend get in the car there.
Then again, we're talking a car with what, 4 or 5 guys in it? That could be quite intimidating if it's RIGHT next to your car, and they are making threats. And if there really was a gun? That takes it to a whole other level and at that point, I can understand what he did for sure.
I do feel that the driving over to the other parking lot area points in the direction of them stashing something, particularly if they really did lie about doing that to cops. However, driving off could also be chalked up to panic after a crazy thing just happened, and sorting their thoughts out, then deciding to return back once they'd calmed down a bit and realized the threat had departed...
So I just don't know.
Dunn could be an absolute piece of shit, a horrible man who shot up a car full of young guys for no good reason. I just personally find the narrative flow of what he describes to be more believable than the other option. I'm not firmly decided though.
In the end, it's really stupid to complain about loud rap music coming from a car full of young guys... really, really stupid. Something I'd never do. He should have tolerated it for another minute or whatever til she got back to the car.
Then again, the guy's in his late 40's right? At that age, he may feel he's seen the country he grew up in change in some ways that really piss him off, and maybe telling some kids to turn down the music was his way to vent about that... I still think that's stupid, but I can understand it. And it doesn't merit him having his life threatened, if that's what happened, or spending the rest of his days in prison for reacting reasonably to that threat (again, if that's what happened)
And clearly, having loud music going in your car when you're a young man, and reacting like a hothead when told to turn it down, also do not justify you being shot dead. IF that's all that they did.