No matter what SloJoe babbles on about ‘his’ 1994 gun ban, the facts are:
The Data files for the data used below is available here.
A large amount of research has been done on the federal assault weapons ban that was in effect from 1994 to 2004. It has consistently found no statistically significant impact on mass public shootings or any other type of crime.
This holds true even for research funded by the Clinton administration. Criminology professors Chris Koper and Jeff Roth concluded in a 1997 report for the National Institute of Justice, “The evidence is not strong enough for us to conclude that there was any meaningful effect (i.e., that the effect was different from zero).” Messrs. Koper and Roth suggested that it might be possible to find a benefit after the ban had been in effect for more years. In 2004, they published a follow-up NIJ study with fellow criminologist Dan Woods. They found: “We cannot clearly credit the ban with any of the nation’s recent drop in gun violence. And, indeed, there has been no discernible reduction in the lethality and injuriousness of gun violence.”
Dr. John Lott and others have done similar research on both state and federal assault weapons bans. They’ve found no evidence that any such ban reduced the frequency or deadliness of mass public shootings or had a beneficial impact on any other crime rate. The third edition of “More Guns, Less Crime” (University of Chicago Press, 2010) examined the impact of federal and state assault weapon bans both before, during, and after the federal ban was in effect.
Even a 2014 survey by the left-leaning ProPublica concluded that despite some claims by Democratic politicians, there was no compelling evidence that the federal assault weapons ban had any impact on any type of crime.


As this is written we are just learning some details about the King Soopers shooting in Boulder Colorado. That said, I could have predicted the news before it was reported: The alleged mass murderer had a long history of mental illness (possibly undiagnosed) and had multiple contacts with police. I will predict now that we will soon learn that this man passed a background check. This is easy to predict because we have seen it happen over and over again. Expanding background checks to private sales will not help when the severely mentally ill can pass them!
