Commonwealth v. Arrington

Brief of the American Civil Liberties Union (ACLU), American Civil Liberties Union of Massachusetts, (ACLUM) Electronic Frontier Foundation (EFF), Massachusetts Association of Criminal Defense Lawyers (MACDL), and National Association of Criminal Defense Lawyers (NACDL) as Amicus Curiae in Support of Respondent.

Brief filed: 11/28/2023


Commonwealth v. Arrington

Supreme Judicial Court of Massachusetts; Case No. SJC-13499


The Daubert-Lanigan standard requires that courts assume a “gatekeeper” role regarding the admission of expert scientific and technical testimony. A robust application of the relevant standards is especially essential where, as here, proprietary algorithms are involved, to avoid violations of defendants’ constitutional rights and wrongful convictions predicated on unreliable evidence.


Nicola Morrow, NACDL; Nathan Freed Wessler, ACLU, Jessica Lewis, ACLUM.

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