Did you keep it as a souvenir? Could take it to a Boston area museum in the future.
Nope, the FBI showed up after we informed the State Police & WPD that we were finding 9mm rounds that had impacted the side of our facility. They took the rounds and said they might come back a day or two later to process the scene. They haven't been back since. I think they have bigger fish to fry at the moment and I know they already would expect this kind of thing anyways.
I also noticed that these rounds appeared to not be Law Enforcement style rounds (ie. hollow points.) They're the flat faced slug type rounds that are cheap. Like the Winchester ammo you would typically find at Walmart. I think these rounds came from the suspects.