Main-line lefty here: I'm immensely frustrating to me to read articles that point out that there's no solid research on guns & gun violence when--to the best of my knowledge--congress has been blocking funding for this research for quite some time.
Most likely they have numerous times and buried the results as it would not aline well with their agenda.
That's fatuous and shows your bias.
For one simple reason: if so, the pro-gun lobbies with deep pockets would be screaming the same findings from the rooftops.