I was referring more to background check part (that gets requested from NICS which gets data from the FBI and state agencies, and in turn, the FBI has hooks into other countries background check data when applicable if there's data sharing agreements) -- For example, my one buddy who's originally from the UK always takes a little longer to get his background checks approved for firearm purchases, because they have to check everything they normally would, plus wait for the UK to provide any pertinent check data from his time living over there.
As far as the work authorization mishap...
That could tie a little more into the "sanctuary" aspect.
Chicago has proudly operated as a sanctuary city since 1985. But what does that mean, exactly? Below, get answers on some of your most common questions about the Welcoming City Ordinance. What does the Welcoming City Ordinance do? The Welcoming City Ordinance does three things: What does the...
40thward.org
The Welcoming City Ordinance does three things:
- it prohibits any City employee from asking about or assisting in the investigation of the immigration status of anyone, unless ordered to do so by court or federal law
- it prevents city services from being denied to anyone on the basis of their immigration status.
- it prohibits the Chicago Police Department from participating in or cooperating with federal civil immigration enforcement, unless they are required to do so by a court or federal law.
in reading up on it a little more, there's seems to be a disconnect between work authorizations and legal immigration status (in that they exist in different databases)
So if he had work authorization docs that appeared to be valid, but city employees are prohibited from asking questions about peoples' immigration status, you can see how that one may have slipped through the cracks.