The American Civil Liberties Union has released a new toolkit designed to help defense attorneys uncover the surveillance technologies that police use—and often hide—when building criminal cases.

According to Wired, the toolkit is aimed at lawyers in Massachusetts and targets a range of tools that can shape a prosecution behind the scenes. Those technologies span from facial recognition systems to police reports written with the help of artificial intelligence.

The central concern, as Wired frames it, is concealment. Police may rely on these tools to identify suspects or generate evidence, but the details of how they work—and even whether they were used at all—are not always disclosed to the people being charged or to their lawyers. That gap can make it difficult for a defendant to challenge the accuracy or fairness of the evidence against them.

By equipping attorneys with a practical resource, the ACLU is trying to shift that balance. The goal, per Wired, is to give defense lawyers the means to press for transparency about the technologies feeding into criminal cases in their state.

Why it matters: as police increasingly lean on automated and AI-driven tools, whether defendants can see and contest those systems in court has become a frontline test of due process and civil liberties.