Ninth Circuit clarifies court’s authority over documents inadvertently disclosed to intervenor: Cahill v. Nike, Inc.

In Cahill v. Nike, Inc., (9th Cir.)           F.3d           (Mar. 19, 2025), the Court of Appeals for the Ninth Circuit held that a district court has the authority to order an intervenor to return or destroy confidential documents inadvertently disclosed during discovery.

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Plaintiffs filed a class action alleging discrimination and hostile workplace harassment. After Defendant produced confidential documents under a protective order, Plaintiff’s counsel inadvertently disclosed some to an intervenor media group. The district court upheld a magistrate judge’s denial of Plaintiff’s motion for return or destruction of the documents, agreeing that it lacked authority to order a non-party to do so. Plaintiff appealed.

The Ninth Circuit reversed the order denying Plaintiff’s motion. It held it had jurisdiction under 28 U.S.C. § 1292(a)(1) because the requested relief “was injunctive in nature.” The Ninth Circuit rejected the intervenor’s argument that its limited purpose in the case exempted it from discovery orders, holding per S.E.C. v. Ross (9th Cir. 2007) 504 F.3d 1130, 1148 that its obligations were the same as any other party. Because district courts have an inherent power to oversee discovery and the intervenor did not obtain the documents “through means independent of the court’s processes” (Seattle Times Co. v. Rhinehart (1984) 467 U.S. 20, 34), the district court had the authority to order their return or destruction.

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