Under Half of Illegal Gun Cases Tracked by A.T.F. Were Involved in Black Market Sales - The New York Times

The White House is likely to use the new data to muster support for regulations closing a loophole that has allowed kitchen-table dealers, gun-show vendors and online sellers to avoid background checks required of 80,000 federally licensed dealers by claiming they are not primarily "engaged in the business" of firearms sales...

https://www.nytimes.com/2024/04/04/us/politics/illegal-guns-atf.html

Texas Governor Says Most Gun Crimes Involve Illegally Owned Weapons. That’s Not True for Mass Shootings. — ProPublica

The majority of the state's 19 mass shootings over the past six decades were carried out by men who legally possessed firearms, an investigation by ProPublica and The Texas Tribune found...

https://www.propublica.org/article/texas-greg-abbott-guns-crime-mass-shootings