Me being me, I submitted a FOIA request for the dashcam footage of the five cop cars and the dispatch logs.
Instead of pulling over the easily identifiable car, they pulled over some random guy. They were behind him the whole time but five cop cars pulled behind him thinking that he fired a gun a few minutes back.
He was let go without a citation, but the official reason, despite being paired with the dispatch for the firecracker, was a broken headlamp.
It's crazy how cops just rush to very specific and nuanced crimes. Someone likely said they heard gun shots, and then they scrambled to find them.