CHICAGO - Plaintiffs in a lawsuit against the Department of Homeland Security say U.S. Border Patrol Chief Greg Bovino fabricated a claim that he was struck by a rock before authorizing tear gas during a protest in Chicago.

What we know:

The accusation was filed early Wednesday morning as part of a broader use-of-force lawsuit targeting federal immigration enforcement tactics.

Attorneys for the plaintiffs, which include several Chicago media organizations, are asking a federal judge to allow new evidence showing Bovino’s statement was false.

Video of the incident, already part of the case, shows Bovino throwing a tear gas canister into a crowd of protesters. Bovino previously testified that he and other agents were under attack from people throwing rocks. The plaintiffs now argue tha

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