Unfortunately I dont think this will matter at all, there was plenty of time for those involved to have already destroyed evidence, and as we have seen for ourselves more then once this month, they dont follow rules if any kind, and especially not actual LE protocols, so I very much doubt there was any proper processing and securing of evidence happening at all.
More likely someone scooped up anything incriminating (apparently that included actual witnesses!) and walked away.
No documenting, no anything even slightly resembling correct procedure

MOO!