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Erin Brockovich’s efforts to expose a utility company's contamination of California groundwater were made famous in a 2000 film bearing her name. She joins us to discuss Chicago’s environmental issues.

What is ranked-choice voting? And how could it have impacted Chicago’s Feb. 26 election?

Chicago police have spent nearly $1.5 million on a social media monitoring software called Dunami since 2014, records show. The ACLU of Illinois has called on CPD to end its use of the "spying software." 

Richard J. Daley’s long climb up the Democratic Party ladder began in the 1930s and was fueled by unfailing loyalty to the party – and an extraordinary series of well-timed deaths.

President Donald Trump’s former lawyer returned to Capitol Hill on Thursday for hours of closed-door questioning after publicly branding his former boss a racist and a con man.

Luis Castejon faces a charge of first-degree murder in the shooting Monday of Emanuel Gallegos, a 17-year-old junior at one of the city’s elite public high schools.

Soft, flexible sensors developed by Northwestern University researchers measure an infant’s vital signs and allow physical bonding between baby and parent.

The Joliet Police Department says in a statement that the four were found dead shortly after 10:15 p.m. Wednesday after officers responded to a report of a shooting.

Former federal prosecutor Lori Lightfoot, a political outsider, will be matched up against the ultimate insider, Toni Preckwinkle – a longtime member of the Chicago City Council who now holds the top job in Cook County. 

Preservation Chicago has released its annual list of Chicago’s most threatened historic buildings – and this year, it includes two return entries and an entire category of buildings that dot Chicago’s neighborhoods.

Mayoral candidate Lori Lightfoot tells Carol Marin on “Chicago Tonight” that the Preckwinkle campaign had previously tried to “take her out” by spreading a rumor that she would quit the race.

We meet three political newcomers who upset longtime aldermen – plus a fourth candidate who won an open seat in Tuesday’s election.

Watch the Feb. 27, 2019 full episode of “Chicago Tonight.”

Just how did the vote break down Tuesday, and why was turnout so much lower than expected? Our politics team digs into the numbers in this week's political roundtable. 

Just how did Chicago wind up with 50 wards and 50 aldermen? Geoffrey Baer does the math in this edition of Ask Geoffrey. And: five fast facts about Chicago mayors past.

This feverishly verbal play, now receiving its world premiere at Lookingglass Theatre, poses some epic, cosmic questions while capturing the more familiar aspects of family relationships and identity crises. But it supplies no answers. 

An icy dip in the lake, film festivals, Mardi Gras pastries and a shopping cart race usher in the weekend. Here are 10 things to do in and around Chicago.

The Litter Free Chicago River project will soon include a stretch of the river from North Avenue to Foster Avenue, where the North Branch connects with the North Shore Channel.

Attorneys for inmate Janiah Monroe say she suffers from PTSD and has been a constant target for sexual harassment and abuse inside her all-male prison.

R. Kelly is looking at the possibility of decades in prison if convicted, but there’s no official word on whether his manager or anyone else in his inner circle might face charges.

Political outsider Lori Lightfoot, who was a federal prosecutor in northern Illinois, and Cook County Board President Toni Preckwinkle were the top two vote-getters among 14 candidates in the race for mayor.

Authorities on Wednesday released photos of an offender they believe was involved in the fatal shooting of Emanuel Gallegos outside a high school Monday evening in the Old Irving Park neighborhood.

Several incumbent aldermen were voted out of office and others are headed into a runoff. And despite scandals and investigations, some others prevailed.

Chicago’s longest serving alderman, has been re-elected to an unprecedented 13th term despite a highly publicized federal charge of attempted extortion.

Calling Tuesday’s election a referendum on the “crumbling political machine of the past,” former Chicago Police Board chair Lori Lightfoot claimed a spot in the historic mayoral runoff set for April 2.

A recently discovered collection of old political buttons may tell us something about the voters of an earlier era.