In this case, the Minnesota Supreme Court is considering the scope of a crucial doctrine that protects criminal defendants from being convicted based on evidence obtained in violation of their constitutional rights. Under both the U.S. and Minnesota Constitutions, courts apply an “exclusionary rule” that allows criminal defendants to seek the exclusion of evidence obtained in violation of their rights. For nearly 40 years, the U.S. Supreme Court has chipped away at the exclusionary rule by adopting and expanding the “good faith exception,” a doctrine providing that in some situations courts need not exclude evidence obtained in violation of the Constitution. In this case, officers acquired evidence after arresting someone based on a warrant that was listed as valid due to a recordkeeping error, but which in fact should have been recalled. In July 2023, together with other ACLU attorneys and partners, the SSCI submitted an amicus brief to the Minnesota Supreme Court asking it to hold as a matter of state constitutional law that the exclusionary rule applies to this situation, and that the good-faith exception does not apply. In March 2024, the Court ruled in the ACLU's favor, stating that the district court did not err in finding that the defendant's arrest warrant had been quashed before her arrest and the good-faith exception did not apply.

Federal and state constitutional law requires prosecutors to inquire into and disclose misconduct by members of their prosecution teams. In Massachusetts, the Supreme Judicial Court has applied those principles, and others, in cases that have led to the mass exoneration of people convicted of drug crimes with the assistance of former state chemists who committed misconduct. In Graham, the ACLU and public defenders are asking the Massachusetts Supreme Judicial Court to apply those same principles to a situation where the U.S. Department of Justice has alleged a pattern or practice of misconduct by members of a police department—specifically, the Narcotics Bureau of the Springfield (MA) Police Department. The Springfield investigation was the DOJ’s sole pattern-or-practice investigation during the Trump Administration, but the DOJ has opened several such investigations during the Biden Administration. Graham appears to be the first state supreme court case in the country to consider whether DOJ pattern-or-practice findings can trigger duties under state law to investigate and disclose the misconduct alleged by the DOJ. In a major victory, the Massachusetts Supreme Judicial Court ruled in January 2024 that the Hampden County District Attorney’s Office violated its duties to disclose and inquire about exculpatory evidence of widespread misconduct by Springfield police.

This case involved a state constitutional challenge to New Hampshire’s 2022 statewide Executive Council redistricting plan, which bore the hallmarks of a stark partisan gerrymander. The ACLU and the ACLU of New Hampshire filed an amicus brief in support of a challenge to the map in the New Hampshire Supreme Court.

In this amicus brief, the ACLU and its coalition partners urged robust application of the legal standard governing the admissibility of expert testimony and technical evidence, especially in cases involving opaque or proprietary algorithms.