Matt Kiefer

WBEZ Data Editor, Digital

As WBEZ’s data editor, Matt helps break down large and complex sets of information into stories that matter to Chicagoans.

Click here to read his full bio at

The most common dog breed in Chicago — making up about 14% of all registered dogs — is a mixed-breed dog, followed by pit bulls, Labrador retrievers and German shepherds.
Using data from the Federal Election Commission, the Chicago Sun-Times and WBEZ analyzed the money from Illinois pumped — directly and indirectly — into the 2024 race for the White House.
Cook County saw a 46% increase in overdose deaths tied to the veterinary tranquilizer last year — and a majority of the victims were Black people.
Chicago health officials trying to spot early signs of virus outbreaks in the community say cold temps have hindered sampling efforts.
“Creo que es evidente que hubo un nivel de brutalidad [policial] que la gente experimentó a un nivel histórico y alarmante”, dijo Aislinn Pulley, fundadora de Black Lives Matter Chicago.
More than 900 complaints were filed against officers between May 26 — the date of the first protest after the murder of George Floyd — and June 29.
“It’s infuriating and tragic,” said Colleen Connell of the Illinois ACLU. “The curfew basically gave the Chicago Police Department carte blanche to continue over-policing people of color.”