The repeated use of tear gas by federal immigration officers in Chicago has renewed a debate about how chemical irritants should be used by law enforcement personnel. By Mitch Smith Federal agents ...

Tear gas is a chemical weapon also known as "demonstration control agents" (DCAs). It's designed to disperse large crowds, typically in outdoor settings. Tear gas contains lachrymatory agents, ...

Masked federal agents exit the Broadview ICE facility after launching tear gas and shooting chemical irritants at demonstrators on September 19, 2025. Credit: Ash Lane for the TRiiBE Demonstrators are ...

Federal agents deployed multiple canisters of tear gas in a residential block of the East Side neighborhood Tuesday to quell a clash with residents who demanded the enforcement officers leave the ...

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Federal immigration officers are using chemical irritants to disperse protesters in ways that violate American policing norms and are testing the boundaries of use-of-force laws, video footage from ...

Reports emerged of multiple immigration raids on Friday on Chicago's Northwest Side, including one in which tear gas was deployed by an agent near a grocery store and a school. Four hours early Friday ...

Federal immigration agents again deployed tear gas on Chicago streets Saturday despite mounting scrutiny from a judge over their use of the chemical weapons, sparking fury from fearful residents who ...

Federal agents have used tear gas on protesters at least seven times in the Chicago area so far in October. As federal agents continue to do immigration enforcement across the Chicago area, they ...

Federal agents threw a tear gas canister at people on a busy street in the Logan Square neighborhood on Friday outside a grocery store and near an elementary school. Cell phone video shows what ...

Chicago might see less tear gas as Operation Midway Blitz diminishes. And, when it is used, it might be less effective in colder, wetter weather. But wind adds a factor of unpredictability for a ...