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He saw an abandoned trailer. Then, he uncovered a surveillance network on California's border

Southern California residents are noticing new license plate readers that appear to be operated by the Border Patrol. Some have had confusing encounters with agents.

A roadside device mounted on a small trailer sits on the shoulder beside a two-lane road as a blurred van drives past, with utility poles, trees, and rocky hills in the background under a clear sky.
An automated license plate reader sits along Old Highway 80 near Boulevard in the Jacumba Hot Springs area of San Diego on Feb. 7, 2026. Zoë Meyers for CalMatters

On a cracked two-lane road on the eastern edge of San Diego County, James Cordero eased his Jeep onto the shoulder after something caught his eye. It looked like an abandoned trailer. Inside he found a hidden camera feeding a vast surveillance network that logs the license plate of every driver passing through this stretch of remote backcountry between San Diego and the Arizona state line. 

Cordero, 44, has found dozens of these cameras hidden in trailers and construction barrels on border roads around San Diego and Imperial counties: one on Old Highway 80 near Jacumba Hot Springs; another outside the Golden Acorn Casino in Campo; another along Interstate 8 toward In-Ko-Pah Gorge. 

They started showing up after California granted permits to the Border Patrol and other federal agencies to place license plate readers on state highways in the last months of the Biden administration. Now as many as 40 are feeding information into Trump administration databases as the Democratic-led state chafes over the federal government’s massive deportation program.

The cameras are raising concerns with privacy experts, civil liberties advocates and humanitarian aid workers who say California should not be supporting the surveillance and data-collection program, which they view as an unwarranted government intrusion into the lives of Americans who’ve committed no crime. Moreover, they say the program conflicts with state law. 

Supporters say the devices allow law enforcement to quickly identify and locate people they suspect of serious crimes. They also argue the cameras help agencies spot patterns in drug and human trafficking, and could be used to help locate missing persons, such as children or other vulnerable people. 

 “If you’re not doing anything illegal, why worry about it?” said long-time Jacumba resident Allen Stanks, 70.   

“Everyone is talking about privacy, OK. Stop putting everything on Facebook. ‘Here’s a picture of my food.’ Who cares?” said Stanks.  

Some locals, however, suspect the cameras are behind some unusual encounters they’ve had in recent months with officers from Border Patrol and its parent agency, Customs and Border Protection. In one case agents questioned a grandmother – a lawful permanent resident  – about why she went to a casino, according to her grandson. 

Cordero has a different concern. On his days off, he leads volunteers into the far reaches of the county, leaving water, food and clothing for migrants. He fears his colleagues could be detained by agents.

“I’m not so much worried about myself, but I’m worried about a lot of our volunteers that come out,” said Cordero. “I don’t want them to have to deal with any of the nonsense of being tracked or being pulled over and questioned.” 

A person wearing a baseball cap and plaid shirt stands with arms crossed beside a rusted metal post outdoors, with shrubs and a clear blue sky in the background.
James Cordero, water drop coordinator for Al Otro Lado, in the Jacumba Hot Springs area of San Diego on Feb. 7, 2026. Cordero is concerned about the use of new automated license plate readers along the U.S.-Mexico border in California.
Zoë Meyers for CalMatters

He has good reason to be nervous. During the first Trump administration, federal officials prosecuted volunteers from the humanitarian group “No More Deaths” for leaving water and supplies for migrants in the Arizona desert. The volunteers faced charges, including “abandonment of property” and felony harboring, though the convictions for some were later overturned.

Border Patrol provides little information about its use of license plate readers on its website. In 2020, the Department of Homeland Security issued a report that describes the technology in general, but doesn’t specify where it’s being used. The Markup and CalMatters reached out to Border Patrol and Homeland Security officials for comment, but did not receive a response. 

“There’s no transparency, that’s the worst part,” Cordero said. 

The Homeland Security report says some readers are capturing license plate numbers, as well as the make and model of the vehicle, the state the vehicle is registered in, the camera owner and type, the GPS coordinates for where the image was taken, and the date and time of the capture. 

The “technology may also capture (within the image) the environment surrounding a vehicle, which may include drivers and passengers,” the report states. It also says feds can access license plate readers operated by commercial vendors. 

Mapping hidden cameras

Earlier this month, the Electronic Frontier Foundation and a coalition of 30 organizations sent a letter to Gov. Gavin Newsom and the California Department of Transportation urging them to revoke state permits and remove the covert readers operated by federal agencies like Customs and Border Protection and the Drug Enforcement Agency along California border highways.

The San Francisco-based privacy and civil rights advocacy organization, also known as EFF, mapped out more than 40 hidden license plate readers in Southern California, most of them along border roadways. It contends the devices bypass a 2016 state law that spells out how law enforcement agencies can use automated license plate readers, which are often referred to as ALPRs.

“By allowing Border Patrol and the DEA to put license plate readers along the border, they’re essentially bypassing the protections under (California law),” said Dave Maass, the director of investigations for EFF. “That is a backdoor around it.”

Maass said he believes Cordero’s concerns about the agency surveilling humanitarian volunteers may be valid. 

“They claim they might be looking for smugglers or they might be looking for cartel members, but that’s not who they’re collecting data on,” said Maass. “(The program) is primarily collecting data on people who live in the region. 

Maass said there’s no way to be certain which agency is installing each camera, but his organization checked with all other agencies operating in the area, such as the San Diego and Imperial sheriff’s departments, the California Highway Patrol, and Cal Fire, among others.

Close-up of a camera unit mounted inside a recessed compartment on a white roadside trailer, with rocky hills and vegetation blurred in the background.
A portable roadside camera trailer sits on the shoulder beside a highway stretching through low, brush-covered hills, with a traffic cone placed near its hitch and trucks visible in the distance.
First: An automated license plate reader sits along Old Highway 80 outside the Jacumba Hot Springs area of San Diego on Feb. 7, 2026. Last: An automated license plate reader sits along Interstate 8 in the southeastern area of San Diego County on Feb. 7, 2026. Photos by Zoë Meyers for CalMatters
A two-lane road curves through a tree-lined valley toward sunlit mountains, with long evening shadows stretching across the landscape.
Automated license plate readers have been placed along Old Highway 80 in the Campo community of San Diego County, on Feb. 7, 2026.
Zoë Meyers for CalMatters

The camera models currently installed on state highways in the border region are the same as ones the Border Patrol purchased in large amounts, according to Maass. Records obtained from Caltrans by EFF from 2016 appear to show Drug and Enforcement Administration and Border Patrol requesting permits to install the same devices in other parts of San Diego County, according to Maass. 

Customs and Border Protection did not respond to a request for comment. The governor’s office did not comment. The Drug Enforcement Agency also did not respond to a request for comment. 

Caltrans approves ALPR requests

By day, Cordero works in water-damage restoration, the crews residents call after floods and burst pipes. Comfortable with emergencies, he’s the type of guy you’d hope to run into if your car broke down in the middle of nowhere. 

“People are literally dying out here,” Cordero says of his volunteer work, done through the nonprofit Al Otro Lado, a legal services organization that also provides humanitarian support to refugees, migrants and deportees on both sides of the U.S.-Mexico border. “All we’re trying to do is prevent people from dying.” 

In response to questions from The Markup and CalMatters, a spokesperson for Caltrans provided a written statement that the state agency has approved eight permits for license plate readers from federal agencies, like Customs and Border Protection and the Drug Enforcement Administration, to be stationed in state highway rights-of-way.

“Caltrans does not operate, manage, or determine the specific use of technology or equipment installed by permit holders, nor does it have access to any of the collected data,” the statement read in part. 

Caltrans said federal immigration agencies haven’t requested permits for the cameras since June 2024. They did not say how long a permit lasts. Between 2015 and 2024, their records indicate Customs and Border Protection and the Drug Enforcement Administration requested 14 permit applications for “law enforcement surveillance devices.” Of the 14, eight were approved, four were cancelled by the applicants and two did not result in projects in state right-of-way, the agency said.

In California, license plates are tracked not only by the federal government and law enforcement, but also by schools and businesses, including some Home Depots and malls. While schools and businesses may not agree to pass that information on to the federal government, local police with access to those cameras may do so.

California law prevents state and local agencies from sharing license plate data with out-of-state entities, including federal agencies involved in immigration enforcement. A Markup and CalMatters investigation in June 2025 revealed that southern California law enforcement agencies, including sheriff’s departments in San Diego and Orange counties, haveshared automated license plate reader data with federal agencies in violation of state law.

A person wearing a cap, sunglasses, and a plaid shirt crouches beside a roadside trailer device, holding a phone up to photograph or inspect its rear panel, with brush and dirt terrain in the background.
James Cordero, a water drop coordinator for Al Otro Lado, photographs the camera on an automated license plate reader outside the Jacumba Hot Springs area of San Diego on Feb. 7, 2026.
Zoë Meyers for CalMatters

Newsom vetoed a bill to strengthen California license plate reader law last fall. Two days later, Attorney General Rob Bonta filed a lawsuit against the city of El Cajon for multiple violations ofthe license plate sharing prohibition. Since 2024, the attorney general’s office has sent letters to 18 law enforcement agencies, including the Imperial County Sheriff’s Office, the San Diego Police Department, and the El Centro Police Department.

Local agencies continue to share license plate data with federal immigration authorities, and not just along the border. The San Pablo Police Department in Northern California, one of the law enforcement agencies that received letters from the attorney general’s office, shared license plate data with the  Border Patrol as recently as last month, according to records obtained by Oakland Privacy head of research Mike Katz-Lacabe. Some cameras are easy to spot, but Katz-Lacabe said that local police have concealed cameras that scan license plates for more than a decade, sometimes behind the grill of police cruisers or inside speed limit trailers or in a fake saguaro cactus.

“This has been the practice for years,” he said.

On a recent Saturday, Cordero was dressed for the remote border terrain – flannel, hiking boots, a San Diego Padres cap pulled low against the sun. His dirt-caked Jeep is built for places roads don’t go. On this particular weekend, supplies at one of the drop sites had already been used, indicating people may be crossing in the area. 

Cordero has gotten good at finding stuff out here. In the remote Ocotillo washes, where the scrubs claw at people’s shins, he recently found what he believes to be the remains of a human finger.

A year earlier, Cordero found a phone contact list next to human remains. He and his wife, Jacqueline Arellano, were able to use the phone list to notify the person’s family in Arizona about where their missing loved one fell.

That’s why when, months ago, he first saw the abandoned trailer along the side of the road on Old Highway 80, he had to stop to take a closer look. 

“It took me passing by a few times before I realized what it was,” said Cordero. 

Pulling over grandma

An Associated Press investigation published in November revealed that Border Patrol had hidden license plate readers in ordinary traffic safety equipment. The data collected by the agency’s plate readers was fed into a predictive intelligence program monitoring millions of American drivers nationwide to identify and detain people whose travel patterns the algorithm deemed suspicious, according to the AP’s investigation.

Sergio Ojeda, a community organizer with the mutual aid group Imperial Valley Equity and Justice said CBP apparently believed his grandmother’s driving patterns were suspicious because they interrogated her about the amount of time she spends at local casinos in the area. 

“She was outraged about it,” said Ojeda. His grandmother, a resident of Imperial Valley with legal status, was crossing the border when agents asked her about her trips to casinos. 

“She asked them back, ‘Is something wrong with that? Am I not supposed to be doing that or why are you questioning me about this?’ and they were like “Oh, no, it just seems suspicious,” Ojeda recounted. 

Ojeda said he was equally concerned, and he doesn’t enjoy the feeling of being watched just because he lives near the border. “It’s how I feel every day,” he said. “Driving around, I joke with my co-workers: ‘Which chapter of 1984 is this?’” 

Following Markup investigation, Congress finds data brokers cost consumers tens of billions of dollars

A congressional investigation estimates broker breaches have cost consumers $20 billion in identity theft. Major brokers now promise to make it easier to opt out of their databases.

Sen. Maggie Hassan kicked off an investigation into data brokers in response to CalMatters reporting. Hassan speaks during a Senate Finance Committee on Capitol Hill, March 14, 2025. Ben Curtis, AP Photo

Breaches at data brokers have cost American consumers more than $20 billion, Congress’s Joint Economic Committee revealed Friday as part of an investigation triggered by The Markup and CalMatters. 

The estimated losses stem from identity theft linked to just four recent data breaches involving major brokers, the committee said in a report. 

Released by the committee’s Democratic minority, the document repeatedly cited reporting into data brokers from The Markup and CalMatters, done in collaboration with WIRED. 

The committee followed up directly on the Markup and CalMatters’ reporting, which in August showed how data brokers were hiding from search engines legally-mandated pages where Californians can request that the brokers delete or stop selling their data. 

Shortly after that story was published, New Hampshire Democratic Sen. Maggie Hassan, ranking member of the committee, sent a letter pressing some brokers to explain their practices. In response, the report revealed, four major data brokers engaged with congressional staff and changed their practices to make it easier for consumers to control the use of their data. 

Data brokers and the ‘no-index’ tag

Data brokers, as defined in the California law that requires brokers to provide consumers the so-called “opt out” pages, are companies that gather data on consumers, then sell that data to other companies who do not have a direct relationship with the consumers. Typically, companies buy such information from data brokers for marketing purposes.

Brokers can gather the data from information like public records, or more invasive methods like tracking online activity. Though brokers hold potentially sensitive information on consumers, many Americans are unaware they exist. 

Under the California law, data brokers that reach a certain size are required to register and provide a clear way for consumers to request that their information be removed, that it not be sold or that they get access to it. But The Markup and CalMatters’ August story examined how several data brokers used code called the “no-index” tag on pages where consumers could exercise their right to opt out. 

The tag is used to tell search engines not to index the page, meaning the information may not be returned in search results. The story noted that this created a barrier for consumers looking to block brokers from using their data. Many of the data brokers quickly removed the tag as the story was published. 

In response to that initial reporting, Hassan independently contacted five major brokers, asking for more information about their practices. Only one registered broker, called Findem, declined to engage with staff or change its practices, the report said. 

“Following Ranking Member Hassan’s requests, most companies took action to make their opt out and other privacy pages more visible for individuals, including by removing ‘no index’ code, adding opt-out links in more prominent locations, and publishing blog content that explains how consumers can exercise their privacy rights,” the report reads. “Ranking Member Hassan welcomes these actions as supporting greater protection for consumers against scams and other harms.”

Billions in losses

The report goes on to estimate the potential losses incurred by consumers because of recent data broker breaches, pegging the number at $20.8 billion. 

Congressional staff found that hundreds of millions of people were exposed by just four major data broker breaches in the last 10 years. The breaches counted were a 2017 Equifax incident, impacting 147 million people, as well as others involving Exactis in 2018, 230 million people, National Public in 2023, 270 million people and TransUnion in 2025, 4 million people. 

Using estimates of the number of people who experience identity theft after breaches, as well as an assumed median loss of $200 from thefts, the report arrived at the nearly $21 billion figure. 

The report calls for action to prevent such losses in the future, including by filling gaps exposed by The Markup and CalMatters’ reporting on brokers. 

“The Committee’s findings underscore the need for clear, easy access to opt-out options and more rigorous oversight within the data broker industry. Especially given the Committee’s calculation that U.S. residents have lost more than $20 billion in recent data breaches, additional action is needed to protect Americans from scams connected to data brokers,” the report reads. “At a minimum, opt-out options should be easy to locate and use.” 

A new state website allows Californians to remove their personal information from hundreds of brokers at once. The Markup and CalMatters have a guide to using the website here.

California tried to protect students’ data. Tech companies found loopholes

A legislative battle is under way over gaps that allow companies to collect and sell students’ personal information.

A young student sits at a table, headphones on, looking at a computer screen in a classroom. The students head peals over the top of the screen as their attention is focused on the computer.
Students in a classroom in Sacramento on May 11, 2022. Miguel Gutierrez Jr., CalMatters

For every aspect of a student’s life, there’s a tech company trying to digitize it. Inside the classroom, online tools proctor exams, create flashcards and submit assignments. Outside, technology coordinates school sports, helps bus drivers find the right route and maintains students’ health records. 

California has a number of laws aimed at protecting children’s data privacy, but those laws have exceptions that allow many tech companies to continue packaging and selling students’ personal information.

This year, Assemblymember Dawn Addis, a San Luis Obispo Democrat, is carrying a high-profile state bill that would add new protections for students. She says it’s important, especially as the Trump admin is trying to collect data about California residents’ immigration status, gender identity, and their use of certain public benefits.

Historically, California has been a leader in data privacy. In 2014, California passed a landmark student privacy law that prohibited technology companies from selling students’ data, targeting students in advertising, or disclosing their personal information. Then in 2018, the state passed another unprecedented bill that required all companies give California users certain privacy rights, such as a chance to opt out of data collection and delete some of their information. 

But as technology evolved and proliferated, privacy laws repeatedly fell short in protecting California’s students — at the same time that the federal government has tried to collect increasing amounts of personal information, Addis said.   

Her bill would restrict how AI companies use student data and create new data protections for college students. Some of Sacramento’s most powerful players are paying close attention to the measure, including the California Labor Federation, which supports the bill, and the California Chamber of Commerce, which opposes it. Combined, these two groups spent nearly $8 million on campaign donations to state legislators or other political activities in 2024, according to the CalMatters Digital Democracy database. TechNet, a trade association that represents many of the most powerful tech companies, also opposes the bill. 

The proposal, Assembly Bill 1159, would close certain loopholes in the state’s 2014 education privacy law, but experts say it may not be enough to prevent companies from selling students’ data. 

A privacy expert struggles to keep her information private

Jen King is a privacy and data policy fellow at Stanford’s institute for AI, where she studies the tricks that companies use to gather users’ data and prevent them from opting out, sometimes known as “dark patterns.” In her personal life, she’s vigilant about avoiding online data tracking and maintains a landline in her Bay Area home to avoid giving out her cell phone number. 

King doesn’t want her children’s information available online or for any company to sell, though sometimes it happens before she can stop it. 

In the fall, King got an email about a platform called TeamSnap, which her 12-year-old son’s cross country coaches were using to manage the team’s roster. The company wanted her information, including her name, date of birth, gender, email address, and phone number. Once she logged in to the platform, she could see some of her son’s information, such as his name, email, and date of birth, were already listed. Photos and personal information from all of her son’s teammates were also available for her to see. 

“I was super irritated,” she said. “You don’t need my birth date — I’m a freaking parent.” She acknowledged some personal information could be useful for a coach but said that other questions seem designed to help the platform sell information to data brokers and ultimately, to advertisers. 

Her 17-year-old son’s data is also on TeamSnap, she later learned, because his robotics team uses it. This month, when King tried to show The Markup and CalMatters her TeamSnap account, a pop-up appeared, asking her if the company could track her activity across other apps and websites.

Federal law requires companies to get parental consent before knowingly collecting or selling data from children 12 and under, but once a child turns 13, their data is generally treated much like an adult’s information, especially when that child is interacting with tech platforms outside of school. TeamSnap’s privacy policy says it doesn’t knowingly collect personal information about users under 13 “without express parental consent,” though it says in some cases a team or organization may provide information on behalf of the child. 

The policy also says that TeamSnap has “not sold the personal information of any consumer for monetary consideration” in the last 12 months, but that its “use of cookies and other tracking technologies may be considered a sale of personal information under the CCPA (California privacy law).” Information sold to advertisers and marketers included users’ names, contact information, purchase history and geolocation, the policy says.

California privacy law specifically requires certain large for-profit companies to get consent to collect data from anyone under 16. Often, consent happens when a user first opens a website and a pop-up appears, asking if the website can sell your data or track your cookies. 

If a teacher, coach, or other authority figure tells a student that they have to use a website or an app, then the student cannot realistically opt out, King said. They may be too young to understand how to opt out, she added. “Most 15-, 16-year-olds don’t have any idea what this is about.” 

Even older college students may have little agency in the technology they use, especially if it’s required for class or residential life. At Stanford, for example, King said her undergraduate students are often required to create Facebook accounts for student groups. 

The same is true for parents. King said she reluctantly gave TeamSnap her personal information, including her name, email, date of birth, and the landline number for her home, because it was the only way to get updates about her son’s team.

How companies get around California’s education privacy laws

In 2014, California became the first state in the country to regulate education technology companies directly, but being first comes with its drawbacks. “We didn’t have examples of what best practice was,” said Amelia Vance, the president of the Public Interest Privacy Center, a nonprofit organization. The law only applies to products that “primarily” serve K-12 schools and that are designed and marketed for students. 

Many tech companies argue that their products aren’t primarily intended for students or at least that they were not designed or marketed that way. The language-learning app DuoLingo, for example, has a version for schools, but the app is also popular for adults. Apps or technologies serving extracurricular programs or sports teams can claim they weren’t designed and marketed for the classroom, or that their use isn’t mandatory, said Vance. “You have this sort of black hole where there haven’t been protections.” 

Addis’ bill expands the number of education technology companies that fall under the state’s student privacy laws, but the language is murky when it comes to apps or online services used outside of class. 

In the case of TeamSnap, Addis’ communications director Alexis Garcia-Arrazola said the company would “most likely” fall under the scope of the bill if its technology is marketed to schools, if schools direct students to use it, and if the sports team is sponsored by the school.  

Public records show that Piedmont Unified School District in Alameda County, Tamalpais Union High School District in Marin County, and Santa Monica Malibu Unified School District all purchased versions of TeamSnap, but only the Santa Monica Malibu district responded to questions about any privacy restriction imposed on the company. Brandyi Phillips, the chief communications officer for the Santa Monica Malibu schools, said the district has an annual subscription with TeamSnap, which is only available to sports staff and parents. She said there’s an agreement with the company “to protect District information and to prevent unauthorized access” but did not clarify if that agreement prevents the district from selling students’ information. 

Berkeley Unified School District, where King’s children attend school, did not respond to questions about any contracts, purchase orders or agreements with TeamSnap. 

Locally, school districts and colleges have the power to negotiate the privacy terms of any contract they make with a technology company, but many websites and apps offer free versions that a teacher or coach might recommend without getting formal approval from their district. 

Last year, the California State University system signed a nearly $17 million contract with Open AI, the company that operates ChatGPT, including an agreement that the company will not train its models on student data. Advocates for Addis’ bill say the same privacy restrictions should apply to any AI company with access to California student data, regardless of whether the company has an agreement with the student’s school district or college.

Are privacy laws getting stricter or looser?

Addis’ bill comes as privacy laws in California and across the country are in flux. In 2020, California voters approved a proposition to create a new state agency to enforce data privacy rules and regulate the businesses that collect data. Advocates for the proposition contributed over $6.7 million to the campaign, compared to just over $50,000 contributed by the opposition, according to state data. The state agency that the proposition formed, now known as CalPrivacy, released new rules this year, restricting the use of automated decision-making technology, such as the use of AI to make admissions or hiring decisions. Those rules were originally stricter but businesses, lawmakers and Gov. Gavin Newsom pressured the CalPrivacy board to water them down.

In Washington D.C., Congress is considering changing federal law to limit how companies interact with children under 17. Separately, Congress is considering a bill that would require social media companies to prevent and mitigate children’s sexual exploitation, bullying, and self-harm. California Attorney General Rob Bonta is concerned that one version of the social media bill contains language that could erode existing protections in California law.

Bonta’s office is responsible for enforcing many of the state’s existing privacy laws. In November, he said the state worked with Connecticut and New York to reach $5.1 million in settlements against Illuminate, an education technology company that uses data to track and evaluate students’ progress, such as their testing scores and developmental milestones. The company had a data breach, exposing “sensitive information” from over 434,000 California students, the state attorney general’s office said in a statement.

It was the first time California successfully went after a company for violating the state’s landmark 2014 education privacy law.

To increase enforcement, Addis’ bill contains a new provision — the right for students and parents to sue tech companies in certain cases for privacy violations. Business and technology groups have opposed the bill, arguing that the new regulations and the right to sue would stifle investment in AI-powered learning tools.

King said that giving consumers the right to sue is often the only way to increase enforcement. Otherwise, the onus is on individual consumers to find concerning practices and try to opt out. 

Despite being an expert in data privacy, King said that she struggled at first to figure out how to delete her TeamSnap account, only later to discover that she needed to send an email to the company. She laughed at the irony, since it’s these kinds of dark patterns in user design that fuel part of her research. 

In academia, the strategy of trapping customers is sometimes called the “roach motel,” she explained, a reference to a popular television ad from the late 1970s for a cockroach trap. 

“You can check in,” she said, “but you can never check out.” 

Blacklight, our privacy inspector tool, now tracks X and TikTok pixels

We’ve updated Blacklight, our popular privacy tool, to check for TikTok and X trackers.

Illustration of the Blacklight logo, with a purple swish behind it. On the bottom right hand corner is a star-shaped sticker with the words "UPDATE" and a wrench icon.
Gabriel Hongsdusit

Since 2020, readers have used Blacklight, our pioneering website privacy inspector tool, to run more than 18 million scans. Previously, Blacklight detected tracking pixels from Google and Meta. Today, we’re announcing that it can scan for two more digital trackers: TikTok and X pixels.

Scan a website

A tracking pixel is a small piece of code added to a website that sends information about the site’s users to the platform that operates the pixel. That can include details of a user’s activities, such as their browsing activity, purchases and searches. A website that embeds a pixel often does so to inform its advertising campaigns on the platform that create the pixel. When its pixel is embedded across many websites, the platform can compile a user’s data to build a detailed profile of their interests, behavior and other personal information. These profiles allow other businesses to buy ads from the platform to target categories of users — though this data can also be used for other purposes.

When you look up a website in Blacklight, it will now report if it finds the TikTok pixel or X pixel. More detailed information about the specific data being passed through pixels is also available by clicking on “Learn more” in the top right of the results, then clicking the link to “download an archive.”

To develop these new features, we partnered with a group of computer science students in Brandeis University’s Capstone in Software Engineering course. These students – Yiyou “Felix” Fan, Jiawen “Zena” Hu, Hengye Li, Hongchen “Steven” Yang and Yiquan “Frank” Zhang – researched and developed the features with the support of our product team.

Blacklight’s pixel detection features have already powered our Pixel Hunt investigations, which revealed that sensitive personal user information was being shared from government websites with Meta and Google, leading to lawsuits, removal of pixels from sites and increased government scrutiny. These new features give a fuller picture of the digital privacy landscape by exposing tracking pixels from two more companies.

We hope these new features will help you better understand what happens to your data as you navigate the internet. While Blacklight can’t say exactly what companies like TikTok and X do with our data, it can provide a starting point for deeper investigation into how that data is stored, shared and used across the web.

Do you have questions, suggestions or need help understanding your Blacklight results? You can always reach us at blacklight@themarkup.org

Mamdani to kill the NYC AI chatbot we caught telling businesses to break the law

New York mayor says terminating the ‘unusable’ bot will help close a budget gap

A person in a dark coat and light blue tie speaks at a wooden podium outdoors, smiling slightly as a microphone stands in front of them, with the pale yellow facade and white railing of a government building blurred in the background.
New York City Mayor Zohran Mamdani speaks at a press conference at Gracie Mansion in New York City, on Jan. 12, 2026. Michael M. Santiago, Getty Images

This article is co-reported with THE CITY, a non-profit newsroom that serves the people of New York. Sign up for its newsletter, The Scoop.

In a press conference this week on New York City’s $12 billion budget gap, Mayor Zohran Mamdani zeroed in on the previous administration’s artificial intelligence chatbot as one of “a number of different things we’re going to pursue for savings.”

The chatbot, which was released by the Eric Adams administration in fall of 2023, was meant to provide business owners with an accessible way to check city rules and regulations. But as first documented by The Markup and THE CITY, the bot provided answers that, if followed, would lead to illegal behavior by businesses, like taking a cut of employees’ tips.

A spokesperson for the mayor, Dora Pekec, confirmed in a text message that the new administration plans to take down the chatbot. She said a member of the Mamdani transition team had seen reporting on the bot from The Markup and THE CITY and presented it to the mayor as a possible place to save funds. 

At the press conference, Mamdani blamed Adams for the budget shortfall, saying he had been handed “a poisoned chalice.” To close the deficit, he said he would raise taxes on the wealthy and corporations and look “under the hood” of the city’s budget for potential savings. 

When pressed by reporters on what he might cut, he singled out the chatbot.

“The previous administration had an AI chatbot that was functionally unusable,” Mamdani said. “It was costing the administration around half a million dollars. That, in and of itself, is not something that can bridge this kind of a gap, but it’s an indication of the ways in which money has been spent while refusing to account for the actual costs of what these programs are.”

The bot, built using Microsoft’s cloud computing platform, was part of an ambitious overhaul of digital services in New York called MyCity. The project was meant to streamline access to government but was criticized for relying on outside contractors

It wasn’t clear how much it cost to maintain the chatbot. Just building the bot’s foundations reportedly cost nearly $600,000, close to the figure Mamdani provided. Pekec said they didn’t yet have a date for taking down the bot. 

A broken bot

Testing by The Markup and THE CITY in 2024 showed that, despite promises from the Adams administration, the chatbot would confidently provide incorrect and potentially harmful information to visitors, even on high-stakes topics.

When asked about housing policy, for example, the bot suggested landlords could discriminate against tenants with Section 8 vouchers. Despite being an intended resource for business owners, the bot didn’t know the minimum wage, and told users it was fine to refuse to accept cash for payment despite a city law to the contrary, enacted in 2020.

After The Markup and THE CITY’s initial report was published, readers continued peppering the bot with sometimes farcical questions, which it continued failing to answer properly. The Adams administration defended the bot, saying it would improve over time. 

“We’re identifying what the problems are, we’re gonna fix them, and we’re going to have the best chatbot system on the globe,” Adams said at a press conference. “People are going to come and watch what we’re doing in New York City.”

City administrators soon added disclaimers to the bot advising users to “not use its responses as legal or professional advice.” They also improved some of the bot’s answers, but also appeared to limit the kinds of questions the tool was willing to answer. 

Today, the bot advises visitors to “ask an NYC government question only” and cautions that “responses may occasionally produce inaccurate or incomplete content.” Visitors must agree to accept the bot’s limitations before using it.

Update (Feb. 4, 2026): The city has taken down the chatbot, writing on the bot’s web page that its “beta test has ended” and directing visitors to NYC.gov for government information.

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