In the context of concealed carry, which source is specifically searched for criminal history records?

The National Instant Criminal Background Check System (NICS) is the correct source for searching criminal history records in the context of concealed carry. This system was established as a means to determine whether a prospective buyer of firearms is eligible to own or possess them under federal or state law.

When an individual applies for a concealed carry permit and undergoes a background check, the NICS provides a rapid response by searching multiple databases to ascertain the applicant's criminal history. It checks records from various jurisdictions and combines data from numerous law enforcement agencies to deliver a comprehensive overview of any disqualifying factors, such as felony convictions or restraining orders.

The other options, while they relate to different aspects of record-keeping or administration within the state, do not specifically cater to the extensive criminal history checks required for firearm transactions or concealed carry permit evaluations. For example, the Cook County Clerk's Office primarily manages local government records, the Illinois Department of Transportation focuses on vehicle registration and driving records, while the Department of Human Services pertains to social services and mental health records, which do not encompass the broader scope of criminal history necessary for firearms background checks.