CHICAGO - U.S. Immigration and Customs Enforcement officers arrested a convicted murderer and gang member in Chicago’s southwest suburbs this week, days after Illinois prison officials released him under the state’s sanctuary policies, according to ICE.

What we know:

ICE said its officers arrested Aldo Salazar Bahena, 37, on Monday in northwest suburban Elgin, as part of Operation Midway Blitz, an enforcement effort targeting undocumented immigrants with criminal records in the Chicago area.

Salazar, a member of the Larazo street gang, was convicted in 2007 of beating 21-year-old Fernando Diaz Jr. to death in 2005. He served nearly two decades at Stateville Correctional Center in Crest Hill before being released on Friday.

Prison officials declined to honor a federal immigration deta

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