CHICAGO — A northern Indiana gun shop police have called a key supplier of Chicago’s criminal firearms market announced this week it is closing its doors in what gun violence prevention advocates say is a win for public safety in a city that grapples with thousands of shootings a year.

Westforth Sports Inc. in Gary, Indiana, located 10 miles from the Illinois border, is liquidating its assets and has not finalized a timeline for closure, attorney Timothy Rudd said Friday. Store owner Earl Westforth, who has been in business for more than 50 years, is retiring, Rudd said.

“For years, Westforth was the No. 1 supplier of out-of-state crime guns recovered by Chicago police, fueling our city’s gun violence crisis,” Chicago city attorney Mary Richardson-Lowry said in a statement Friday, calling the store’s closing a “significant victory.”

The development comes after Chicago sued Westforth Sports in 2021, claiming the gun store “engaged in a pattern of illegal sales that has resulted in the flow of hundreds, if not thousands, of illegal firearms” into Chicago, according to the lawsuit filed in Cook County.

Attorneys for the gun store moved to dismiss the case last year, arguing the city’s suit concerned dealings between the gun shop and Indiana residents. A Cook County judge dismissed the suit in May, finding Westforth’s contacts with Illinois were not sufficient for the court to exercise jurisdiction in the case.

The city responded in June by requesting the court modify its order. The city also requested leave to file an amended complaint that establishes a “direct causal connection” between Westforth Sports and Chicago, including allegations that employees knew guns were being straw-purchased for the purpose of re-sale in Chicago. Attorneys for Westforth Sports opposed the motion, and a status conference in the case is expected next month.

Rudd said he could not comment on why the store is not staying in business in the wake of Westforth’s retirement. He said the store’s closure is unrelated to the litigation.

“The truth is, Westforth Sports could continue to stay in business as long as it wants to, and Earl is choosing to go out on his own terms and his own time,” Rudd said.