Halberstam v. Sestak

·1983

What the Court Decided

A D.C. Circuit decision articulating common law aiding-and-abetting factors, including knowledge of the wrongful conduct and substantial assistance, which Congress reportedly viewed as the standard statement of common law.

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Cited In

Cox Communications v. Sony Music Entertainment

2025 Term · 24-171

Cited by Respondents as the common law standard for aiding-and-abetting liability, which uses knowledge rather than purpose as the intent element, with multiple factors for substantial assistance.