Those specifics are taken from a New York Civil Liberties Union court filing. The legal organization is seeking to assist a lawsuit filed by Pro Publica journalist Michael Grabell, who has been fighting New York City for answers about X-ray vans for 3 years.

“ProPublica filed the request as part of its investigation into the proliferation of security equipment, including airport body scanners, that expose people to ionizing radiation, which can mutate DNA and increase the risk of cancer,” he explained. (For fear of a terrorist “dirty bomb,” America’s security apparatus is exposing its population to radiation as a matter of course.)

A state court has already ruled that the NYPD has to turn over policies, procedures, and training manuals that shape uses of X-rays; reports on past deployments; information on the costs of the X-ray devices and the number of vans purchased; and information on the health and safety effects of the technology. But New York City is fighting on appeal to suppress that information and more, as if it is some kind of spy agency rather than a municipal police department operating on domestic soil, ostensibly at the pleasure of city residents.

Its insistence on extreme secrecy is part of an alarming trend. The people of New York City are effectively being denied the ability to decide how they want to be policed.

“Technologies––from x-ray scanners to drones, automatic license plate readers that record license plates of cars passing by, and ‘Stingrays’ that spy on nearby cell phones by imitating cell phone towers—have brought rapid advances to law enforcement capacity to monitor citizens,” the NYCLU notes. “Some of these new technologies have filtered in from the battlefields into the hands of local law enforcement with little notice to the public and with little oversight. These technologies raise legitimate questions about cost, effectiveness, and the impact on the rights of everyday people to live in a society free of unwarranted government surveillance.”

For all we know, the NYPD might be bombarding apartment houses with radiation while people are inside or peering inside vehicles on the street as unwitting passersby are exposed to radiation. The city’s position—that New Yorkers have no right to know if that is happening or not—is so absurd that one can hardly believe they’re taking it. These are properly political questions. And it’s unlikely a target would ever notice. “Once equipped, the van—which looks like a standard delivery van—takes less than 15 seconds to scan a vehicle,” Fox News reported after looking at X-ray vans owned by the federal government. “It can be operated remotely from more than 1,500 feet and can be equipped with optional technology to identify radioactivity as well.”

In her ruling, Judge Doris Ling-Cohan highlights the fact that beyond the privacy questions raised by the technology are very real health and safety concerns. She writes:

Petitioner states in his affidavit, and respondent does not dispute, that: backscatter technology, previously deployed in European Union airports, was banned in 2011, because of health concerns; an internal presentation from American Science and Engineering, Inc., the company that manufactures the vans, determined that the vans deliver a radiation dose 40 percent larger than delivered by a backscatter airport scanner; bystanders present when the van is in use are exposed to the radiation that the van emits… moreover, petitioner maintains, and it is not disputed by the NYPD, that ‘there may be significant health risks associated with the use of backscatter x-ray devices as these machines use ionizing radiation, a type of radiation long known to mutate DNA and cause cancer. Finally, petitioner states, again without dispute, that, on August 2011, the United States Customs and Border Protection Agency, which used the vans to scan vehicles crossing into and out of the United States, despite repeated testing and analysis of the amount of radiation emitted by such devices, nevertheless, prohibited continued use of the vans to scan occupied vehicles, until approval was granted by the United States Custom and Border Protection Radiation and Safety Committee...

And since the technology can see through clothing, it is easy to imagine a misbehaving NYPD officer abusing it if there are not sufficient safeguards in place. Trusting the NYPD to choose prudent, sufficient safeguards under cover of secrecy is folly. This is the same department that spent 6 years conducting surveillance on innocent Muslims Americans in a program so unfocused that it produced zero leads—and that has brutalized New York City protestors on numerous occasions. Time and again it’s shown that outside oversight is needed.