The number includes both.
Probably the most important number is the 325 murders or attempted murders. The 23K collected from crime scenes could easily be crimes where the firearm collected had nothing to do with the crime. But of the 325, not that it should be sufficient to justify a law, how many were SN’s scraped off. Their wording throughout all the press tries to impugn hobby guns. Okay, so how many of those guns made by enthusiasts are actually involved in that 325?The number includes both.
Also, how many of that 23K collected from crime scenes were guns made by enthusiasts? And how many of those were directly involved in the crime? Sounds more like if there’s a problem, it’s a problem with criminals scraping off SN’s. I dunno. Maybe make a law against scraping off SN’s of serialized guns?