Video of the shootout here:
https://fox2now.com/news/fox-files/video-shows-intense-shootout-at-wellston-market-gunmen-wanted/
Total s-—show, two bystanders shot.
It appears much as I expected, a gang shootout, probably enforcing their "turf" against someone who dared attempt to steal from a gang member.
You can see the rifle was not what would normally be called "openly carried", but was sloppily concealed carried under the jacket.
The person carrying it covers it up when it is exposed.
The robber who stole it, tries to get it to work while he is under fire.
The robber is unsuccessful.
Confederates of the rifle carrier work in coordination to shoot the robber, then flee together in a white car.