by Karen Gullo, Activist Post:
In a victory for transparency in police use of facial recognition, a New Jersey appellate court today ruled that state prosecutors—who charged a man for armed robbery after the technology showed he was a “possible match” for the suspect—must turn over to the defendant detailed information about the face scanning software used, including how it works, source code, and its error rate.
Calling facial recognition “a novel and untested technology,” the court in State of New Jersey v. Francisco Arteaga held that the defendant would be deprived of due process rights unless he could access the raw materials police used to identify him and test its reliability to build a defense. The inner workings of the facial recognition software is vital to impeach witnesses’ identification of him, challenge the state’s investigation, and create reasonable doubt, the court said.
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The ruling is a clear win for justice, fairness, and transparency. Study after study shows that facial recognition algorithms are not always reliable, and that error rates spike significantly when involving faces of folks of color, especially Black women, as well as trans and nonbinary people. But despite heightened inaccuracy for members of vulnerable communities often targeted by the police, that hasn’t stopped law enforcement from widely adopting and using this unreliable tool to identify suspects in criminal investigations.
EFF, along with Electronic Privacy Information Center (EPIC) and the National Association of Criminal Defense Lawyers (NACDL), filed an amicus brief in this case on behalf of the defendant, arguing that the court should allow robust discovery regarding law enforcement’s use of facial recognition technology.
The court agreed. Information about the substantial risk of error in facial recognition technology (FRT) shown by the defendant’s expert witness and amici, including EFF, “provide us with convincing evidence of FRT’s novelty, the human agency involved in generating images, and the fact FRT’s veracity has not been tested or found reliable on an evidential basis by any New Jersey court,” the three-judge appellate panel said.
In Arteaga, a facial recognition search conducted by the New York Police Department for New Jersey police was used to determine that Arteaga was a match of the perpetrator in an armed robbery at a store in New Jersey.
Here’s how it worked. New Jersey detectives generated a still image of the suspect derived from surveillance camera footage. It was first analyzed by New Jersey investigators, who found no matches for the image in their face scan databases. The detectives then sent all surveillance footage to the facial recognition section of the New York Police Department Real Time Crime Center (RTCC). A center detective captured a still image from the footage, compared it against the center’s databases, and offered Arteaga as a “possible match.” New Jersey detectives showed his image to two witnesses, who identified him as the robber.
Despite the centrality of the match to the case, nothing was disclosed to the defense about the algorithm that generated it, not even the name of the software used. Mr. Arteaga asked for detailed information of the search process, with an expert testifying the necessity of that material, but the trial court denied those requests.