On the morning of September 2, 2024, a routine commute on the Chicago Transit Authority’s Blue Line was shattered by a horrific mass shooting. As a westbound train approached Forest Park, four lives were brutally cut short. In the immediate aftermath, law enforcement swiftly activated a sophisticated digital dragnet, a sprawling surveillance network intricately woven from thousands of cameras across the city. This network proved instrumental in the swift apprehension of the alleged gunman.

The initial phase of the investigation involved a rapid review of the transit agency’s own surveillance cameras, which chillingly captured the alleged perpetrator shooting the victims execution-style. Following the suspect in real-time through the transit system, law enforcement disseminated the captured footage to transit staff and thousands of officers. The breakthrough came when an officer in the neighboring suburb of Riverdale recognized the suspect from a previous arrest. Within a mere 90 minutes of the shooting, the suspect was apprehended at another train station, his identity, address, and criminal history already established by authorities.

For many Chicagoans, this rapid technological response is hardly surprising. The city boasts an estimated 45,000 surveillance cameras, placing it among the highest per capita in the United States. Chicago also operates one of the nation’s most extensive license plate reader systems, with the capability to access audio and video feeds from various independent agencies, including Chicago Public Schools, the Chicago Park District, and the public transportation system. This vast network is further augmented by numerous residential and commercial security systems, such as Ring doorbell cameras, creating an unprecedented level of interconnected surveillance.

While law enforcement and security proponents laud this extensive monitoring system as a vital tool for public safety, a growing chorus of activists and residents voices deep concerns. They describe Chicago as a "surveillance panopticon," a pervasive environment that they argue stifles behavior, infringes upon privacy, and undermines fundamental rights to free speech. Lance Williams, a scholar of urban violence at Northeastern Illinois University, points out the historical context of targeted surveillance in Black and Latino communities, suggesting that this intensified scrutiny has yielded new problems without delivering promised safety. He emphasizes that addressing the root causes of crime and violence, such as economic inequality, lack of affordable housing, and insufficient mental health services, is crucial for genuine community safety.

Recent years have witnessed significant pushback against unchecked surveillance in Chicago. For instance, the city was once the largest customer of ShotSpotter, an acoustic sensor system designed to detect gunfire. Introduced in 2012 on the South Side, the network expanded to cover approximately 136 square miles, or about 60% of the city, by 2018. However, critics questioned ShotSpotter’s efficacy and highlighted its disproportionate deployment in Black and Latino neighborhoods. These concerns intensified following the March 2021 fatal shooting of 13-year-old Adam Toledo by police responding to a ShotSpotter alert. This tragedy became a rallying point for the #StopShotSpotter movement and a key issue in Brandon Johnson’s successful mayoral campaign in 2023. Upon taking office, Johnson terminated the city’s contract with SoundThinking, the company behind ShotSpotter, which had cost Chicago over $53 million. In response, SoundThinking maintained that ShotSpotter enables faster response times and more effective aid to victims and evidence location, asserting that communities facing high gun violence deserve rapid emergency response.

Despite successful resistance to some forms of police surveillance, countervailing forces are at play. Chicago and its surrounding suburbs are increasingly moving to expand surveillance technologies, often driven by public pressure and a desire to address crime. The victory against acoustic surveillance may prove temporary, as the city recently issued a request for proposals for new gun violence detection technologies. This dynamic reflects a complex interplay between digital privacy advocates, defense attorneys, law enforcement officials, and ordinary citizens grappling with the evolving landscape of urban surveillance.

Alejandro Ruizesparza and Freddy Martinez: Cofounders, Lucy Parsons Labs

In Oak Park, a suburb renowned for its architectural heritage, a three-year campaign against the installation of automated license plate readers (ALPRs) from Flock Safety highlighted community resistance to expanding surveillance. The group Freedom to Thrive, comprised of diverse residents, suspected the technology’s inequitable impact. They enlisted the expertise of Lucy Parsons Labs (LPL), a Chicago-based nonprofit focused on digital rights, to navigate the process of requesting ALPR data under the Illinois Freedom of Information Act (FOIA).

Named after a prominent labor organizer, LPL investigates technologies like ALPRs, gunshot detection systems, and police body cameras. The organization provides digital security and public records training, assisting communities in auditing and analyzing surveillance systems. Led by Alejandro Ruizesparza, a community organizer with a data science background, and Freddy Martinez, a former community organizer with a physics background, LPL operates with a blend of radical politics and critical theory. They view many surveillance technologies as extensions of historical systems of control, aiming to empower communities to push back against biased policing through technical assistance, training, and litigation.

LPL’s approach often involves filing extensive FOIA requests for raw police surveillance data. In the Oak Park case, their data revealed that Oak Park’s eight Flock ALPRs scanned 3 million license plates in their first 10 months, generating only 42 alerts – a mere 0.000014% yield. More concerningly, while Black drivers constituted only 19% of Oak Park’s population, they accounted for 85% of those flagged by the cameras, exacerbating existing racial disparities in traffic stops. Flock Safety did not respond to a request for comment.

Martinez described LPL’s expertise as born from a "DIY punk aesthetic," developing de facto mastery of FOIA processes through hands-on experience. Their aggressive FOIA requests have previously uncovered covert surveillance practices, such as the Chicago Police Department’s use of "Stingray" devices to track mobile phones. The contentious issue of Oak Park’s ALPRs culminated in a 5-2 vote by village trustees to terminate the contract with Flock Safety, a decision that has inspired similar efforts in communities nationwide.

Brian Strockis: Chief, Oak Brook Police Department

In Oak Brook, a Chicago suburb known for its luxury shopping destination, Oakbrook Center, the police department is pioneering the use of drones as first responders. Chief Brian Strockis, a 25-year veteran of the force, introduced the "drone as first responder" (DFR) program, making Oak Brook the first municipality in Illinois to do so. The initiative aims to reduce dangerous high-speed chases, which pose risks to officers, suspects, and the public.

Strockis views drones as a "force multiplier," enabling the department to achieve more with fewer resources. The department’s drone autonomously launches from the roof of Village Hall, responding to an average of 10-12 calls daily at speeds up to 45 mph, arriving at crime scenes before patrol officers in nine out of ten instances. The department’s real-time crime center integrates livestreams from drones, traffic cameras, ALPRs, and approximately a thousand private security cameras.

While acknowledging privacy concerns, Strockis asserts that protections are in place, including restrictions against random or mass surveillance and the prohibition of facial recognition technology by state law. He highlights the invaluable perspective provided by drone footage, offering an aerial view of unfolding events. This technology, he argues, serves as an additional layer of protection for both the public and officers, complementing existing bodycam and squad car video.

Mark Wallace: Executive Director, Citizens to Abolish Red Light Cameras

Mark Wallace, a real estate investor and mortgage lender, is widely recognized in Chicago, particularly in its African-American communities, as a talk radio host for WVON and a leading advocate against the city’s extensive network of red-light and speed cameras. For two decades, city officials have defended these "automated enforcement" cameras as critical safety measures and a substantial revenue stream, generating approximately $150 million annually and a cumulative $2.5 billion since their installation.

Wallace dismisses the tickets as a "cash grab" that disproportionately burdens Black and Latino communities. A 2022 ProPublica analysis corroborated these concerns, finding that households in majority Black and Latino zip codes were ticketed at significantly higher rates. This disparity was attributed to camera placement in areas encouraging faster speeds and the greater financial strain these tickets impose on lower-income communities.

Wallace’s advocacy began in the early 2010s, inspired by a listener’s call for action from WVON, a station with a history of civil rights activism. Having personally experienced a red-light camera ticket, Wallace organized a community meeting that drew over 300 attendees, revealing widespread dissatisfaction with the system’s inequities. He utilized his radio platform, "The People’s Show," to mobilize communities and advocate for social and economic justice, particularly concerning the automated enforcement program. This advocacy gained momentum when city and state officials were found to have accepted payments from technology and surveillance companies.

Wallace’s group, Citizens to Abolish Red Light Cameras, seeks to repeal ordinances authorizing the camera programs. While outright repeal has not occurred, their political pressure has led to a Chicago City Council ordinance requiring public meetings before any red-light camera installations, removals, or relocations. The group also advocates for increased restrictions on speed cameras. Wallace emphasizes that his efforts are about empowering citizens to effect change, echoing Barack Obama’s call to action: "get a pen and clipboard and go to work to fight to make these changes."

Jonathan Manes: Senior Counsel, MacArthur Justice Center

The case of Derick Scruggs, a licensed armed security guard detained and subjected to a "humiliating body search" by Chicago police officers on April 19, 2021, near a ShotSpotter alert, brought to light the problematic use of gunshot detection technology. Scruggs, who was subsequently arrested on unrelated charges and lost his job and housing, is believed to be among thousands of Chicagoans questioned, detained, or arrested due to ShotSpotter alerts, according to an analysis by the City of Chicago Office of Inspector General.

Jonathan Manes, a law professor at Northwestern and senior counsel at the MacArthur Justice Center, a public interest law firm, took on Scruggs’s case. Manes, who previously worked in national security law, shifted his focus to the intersection of civil rights with police surveillance and technology, aiming to address areas of concern for Chicago residents not widely covered by other organizations.

Manes and his colleagues’ investigation into ShotSpotter revealed that the system generated alerts that often yielded no evidence of gun-related crimes but were used by police as a pretext for other actions. He describes a "pattern of people being stopped, detained, questioned, sometimes arrested, in response to a ShotSpotter alert—often resulting in charges that have nothing to do with guns." Furthermore, the system directed a "massive number of police deployments onto the South and West Sides of the city," areas predominantly inhabited by Black and Latino residents, with 80% of the city’s Black population living in districts covered by the system, compared to only 30% of its white population.

Manes integrated Scruggs’s case into a lawsuit against the city’s use of ShotSpotter. In late 2025, a settlement was reached prohibiting police from stopping or searching individuals solely based on their proximity to a gunshot detection alert. While Chicago decommissioned ShotSpotter in 2024, the agreement will apply to any future gunshot detection systems. Manes stresses the need for broader structural change in how the city utilizes and deploys surveillance technology, advocating for laws that require transparency from local officials and law enforcement regarding proposed technologies and their potential impact on civil rights. More than two dozen jurisdictions nationwide have adopted surveillance transparency laws, but Chicago is not yet among them.