This post was written by Rachel Hochhauser, an EFF legal intern

We’ve written multiple times about the inaccurate and dangerous “gunshot detection” tool, Shotspotter. A recent near-tragedy in Chicago adds to the growing pile of evidence that cities should drop the product.

On January 25, while responding to a ShotSpotter alert, a Chicago police officer opened fire on an unarmed “maybe 14 or 15” year old child in his backyard. Three officers approached the boy’s house, with one asking “What you doing bro, you good?” They heard a loud bang, later determined to be fireworks, and shot at the child. Fortunately, no physical injuries were recorded. In initial reports, police falsely claimed that they fired at a “man” who had fired on officers.

In a subsequent assessment of the event, the Chicago Civilian Office of Police Accountability (“COPA”) concluded that “a firearm was not used against the officers.” Chicago Police Superintendent Larry Snelling placed all attending officers on administrative duty for 30 days and is investigating whether the officers violated department policies.

ShotSpotter is the largest company which produces and distributes audio gunshot detection for U.S. cities and police departments. Currently, it is used by 100 law enforcement agencies. The system relies on sensors positioned on buildings and lamp posts, which purportedly detect the acoustic signature of a gunshot. The information is then forwarded to humans who purportedly have the expertise to verify whether the sound was gunfire (and not, for example, a car backfiring), and whether to deploy officers to the scene.

ShotSpotter claims that its technology is “97% accurate,” a figure produced by the marketing department and not engineers. The recent Chicago shooting shows this is not accurate. Indeed, a 2021 study in Chicago found that, in a period of 21 months, ShotSpotter resulted in police acting on dead-end reports over 40,000 times. Likewise, the Cook County State’s Attorney’s office concluded that ShotSpotter had “minimal return on investment” and only resulted in arrest for 1% of proven shootings, according to a recent CBS report. The technology is predominantly used in Black and Latinx neighborhoods, contributing to the over-policing of these areas. Police responding to ShotSpotter arrive at the scenes expecting gunfire and are on edge and therefore more likely to draw their firearms.

Finally, these sensors invade the right to privacy. Even in public places, people often have a reasonable expectation of privacy and therefore a legal right not to have their voices recorded. But these sound sensors risk the capture and leaking of private conversation. In People v. Johnson in California, a court held such recordings from ShotSpotter to be admissible evidence.

In February, Chicago’s Mayor announced that the city would not be renewing its contract with Shotspotter. Many other cities have cancelled or are considering cancelling use of the tool.

This technology endangers lives, disparately impacts communities of color, and encroaches on the privacy rights of individuals. It has a history of false positives and poses clear dangers to pedestrians and residents. It is urgent that these inaccurate and harmful systems be removed from our streets.

This post was written by Jack Beck, an EFF legal intern

In a recent letter to the FTC and SEC, Sen. Ron Wyden (OR) details new information on data broker Near, which sold the location data of people seeking reproductive healthcare to anti-abortion groups. Near enabled these groups to send targeted ads promoting anti-abortion content to people who had visited Planned Parenthood and similar clinics.

In May 2023, the Wall Street Journal reported that Near was selling location data to anti-abortion groups. Specifically, the Journal found that the Veritas Society, a non-profit established by Wisconsin Right to Life, had hired ad agency Recrue Media. That agency purchased location data from Near and used it to target anti-abortion messaging at people who had sought reproductive healthcare.

The Veritas Society detailed the operation on its website (on a page that was taken down but saved by the Internet Archive) and stated that it delivered over 14 million ads to people who visited reproductive healthcare clinics. These ads appeared on Facebook, Instagram, Snapchat, and other social media for people who had sought reproductive healthcare.

When contacted by Sen. Wyden’s investigative team, Recrue staff admitted that the agency used Near’s website to literally “draw a line” around areas their client wanted them to target. They drew these lines around reproductive health care facilities across the country, using location data purchased from Near to target visitors to 600 Planned Parenthood different locations. Sen. Wyden’s team also confirmed with Near that, until the summer of 2022, no safeguards were in place to protect the data privacy of people visiting sensitive places.

Moreover, as Sen. Wyden explains in his letter, Near was selling data to the government, though it claimed on its website to be doing no such thing. As of October 18, 2023, Sen. Wyden’s investigation found Near was still selling location data harvested from Americans without their informed consent.

Near’s invasion of our privacy shows why Congress and the states must enact privacy-first legislation that limits how corporations collect and monetize our data. We also need privacy statutes that prevent the government from sidestepping the Fourth Amendment by purchasing location information—as Sen. Wyden has proposed. Even the government admits this is a problem.  Furthermore, as Near’s misconduct illustrates, safeguards must be in place that protect people in sensitive locations from being tracked.

This isn’t the first time we’ve seen data brokers sell information that can reveal visits to abortion clinics. We need laws now to strengthen privacy protections for consumers. We thank Sen. Wyden for conducting this investigation. We also commend the FTC’s recent bar on a data broker selling sensitive location data. We hope this represents the start of a longstanding trend.