The head of Chicago’s U.S. Immigration and Customs Enforcement field office Tuesday defended the conduct and decorum of federal agents who have ramped up arrests of undocumented immigrants.

The Chicago City Council, long derided as a mayoral puppet, is increasingly operating independent of the wishes of the mayor’s office.

Based in Gensler’s Chicago office, Sean is the Global Residential Practice Area Leader and Residential Leader for the firm’s North Central region. He is a licensed architect, ...