222 Forensic analysis indicates that up to three weapons were fired at the Trump rally in Butler, Pennsylvania, on Saturday. This suggests that there was more than one shooter. - First three shots came by weapon A - The next five came by weapon B - The final shot was by weapon C (twitter.com) posted 122 days ago by Joys1Daughter 122 days ago by Joys1Daughter +222 / -0 98 comments share 98 comments share save hide report block hide replies
Forensics of this nature should be performed on the bullet. Not acoustics
There is no reason why the bullets could not be collected and analyzed. I doubt the assassin had a handful of barrels on hand