(CNN) — Border Patrol official Gregory Bovino has been summoned to appear in court Tuesday to answer a judge’s concerns about federal agents’ aggressive tactics in Chicago after he was recorded throwing what appears to be a tear gas canister into a crowd.

US District Judge Sara Ellis issued a temporary restraining order this month blocking agents from using certain types of force against protesters. In recent weeks she’s said she has concerns about whether her order was being followed.

Here’s what we know about the incidents in question.

Multiple violations of the order

A court filing against the Department of Homeland Security (DHS) says Bovino, the California-based Border Patrol chief who has been put in charge of the Trump administration’s immigration enforcement crackdown in Chi

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