CHICAGO (WLS) -- The I-Team uncovered a growing number of police agencies aiming to improve the state's decades-old gun licensing law.

In Illinois it takes a state gun card to legally buy or possess a firearm. But there were more than 10,000 Firearm Owner Identification (FOID) cards revoked in 2018 alone because of criminal charges, orders of protection or expiration.
According to the Illinois State Police 75% of those FOID cards were unaccounted for in 2018.
The I-Team rode along with the "gun rustlers," officially known as the Gun Suppression Team, Cook County's specialized force of sheriff's police tasked with tracking down unlawful gun owners. What that takes is making a house-call: knocking on doors and talking to the owners.

https://abc7chicago.com/dedicated-la...wners/5302757/