Chicago to End Controversial Gunshot Detection System Amid Criticism of Ineffectiveness and Bias

The city of Chicago has announced that it will not renew its contract with ShotSpotter, a gunshot detection system, citing concerns over its ineffectiveness and racial bias.

The city of Chicago has made the decision to discontinue its use of the gunshot detection system, ShotSpotter, following widespread criticism of its effectiveness and allegations of racial bias. The technology, which utilizes acoustic sensors and machine algorithms to detect and locate gunfire incidents, has been in use in Chicago since 2018, with the city spending $49 million on the system. However, concerns raised by watchdog and public safety groups have prompted Mayor Brandon Johnson’s office to take action. The decision comes as part of Johnson’s commitment made during his mayoral campaign to end the use of ShotSpotter in the city.

Ineffectiveness and Racial Bias: The Criticisms of ShotSpotter

Critics of ShotSpotter argue that the technology has proven to be ineffective in reducing gun violence and crime rates. The Stop ShotSpotter Coalition and United Working Families have hailed the city’s decision, emphasizing that the resources allocated to the system could be better utilized in implementing other crime prevention strategies. Additionally, watchdog groups have raised concerns about the potential racial bias inherent in the technology. The MacArthur Justice Center’s report found that the majority of ShotSpotter reports did not result in any police action, leading to unnecessary encounters in predominantly Black and Latino neighborhoods.

Controversy Surrounding Gunshot Detection Systems

Gunshot detection systems have been used by law enforcement agencies in major cities across the United States for several years. Proponents argue that these technologies help save lives and reduce crime rates. However, the American Civil Liberties Union (ACLU) and community public safety groups have questioned the accuracy, privacy implications, and potential for biased policing associated with these systems. Some cities, such as Charlotte, North Carolina, and San Antonio, Texas, have terminated their contracts with ShotSpotter due to instances where the technology mistakenly identified non-gunshot sounds as gunfire.

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ShotSpotter’s Troubled History in Chicago

The decision to end the use of ShotSpotter in Chicago is not without precedent. The case of 13-year-old Adam Toledo, who was fatally shot by a Chicago Police Department officer in 2021 after police received a ShotSpotter alert, has been cited as a prime example of the system’s flaws. An Associated Press investigation in 2022 revealed how ShotSpotter data was used to charge a Chicago grandfather with murder, only for the case to be dismissed due to insufficient evidence. A leaked report from the Cook County State’s Attorney’s Office further criticized the technology for its lack of impact on shooting incidents and prosecuting gun violence cases.

Moving Forward: Chicago’s Plans and Community Input

In light of the decision to end the use of ShotSpotter, the city of Chicago plans to focus its resources on more effective strategies and tactics to combat violent crime. The Chicago Police Department will undergo operational changes, including new training and the development of response models to gun violence. Additionally, law enforcement and community safety stakeholders will assess alternative tools and programs that prioritize both safety and trust. The city intends to seek input from community members, violence prevention organizations, and law enforcement to ensure a collaborative approach to public safety.


The decision by the city of Chicago to discontinue the use of ShotSpotter reflects growing concerns about the effectiveness and potential racial bias of gunshot detection systems. While proponents argue that these technologies are essential tools for law enforcement, critics highlight their shortcomings and the need for more comprehensive and community-focused approaches to crime prevention. As Chicago moves forward, it aims to prioritize the development of strategies that foster both safety and trust, with input from various stakeholders. The decision to end the use of ShotSpotter in Chicago may serve as a catalyst for other cities to reevaluate their own reliance on similar technologies and explore alternative solutions to address gun violence and crime.

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