CHICAGO - Border Patrol Chief Gregory Bovino is due in federal court Tuesday to answer questions about the use of tear gas in Chicago, following another weekend incident that left a Northwest Side neighborhood in chaos.

What we know:

A federal judge has barred immigration officers from using tear gas unless agents face an immediate threat. Despite that order, residents in the Old Irving Park neighborhood say Border Patrol agents deployed tear gas Saturday morning as families were gathering for a Halloween parade.

Witnesses said agents tackled a man on Kildare Avenue, drawing a crowd of neighbors who protested what they saw.

"I was pretty upset to be honest with you," said Brian Kolp, a resident. "I am an attorney. I used to work with and in law enforcement, and watching this happen i

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