Almost all were barred from purchasing a gun from a gun store because of their prior criminal record

EXCERPT: The study, funded by an award from the National Institute of Justice, looked at the final sale or transfer of firearms to individuals who then used them to commit crimes. It relied on data from the Chicago Inmate Survey (CIS), which interviewed 221 people convicted of gun crimes serving time at seven Illinois state prisons. By Stephen Gutowski, Washington Free Beacon - June 26, 2019 Posted by Dennis R. Young - June 30, 2019

https://dennisryoung.ca/2019/06/30/study-of-221-people-convicted-of-gun-crimes/