This document summarizes a legal briefing about the Napster peer-to-peer file sharing service. It discusses how Napster was sued for copyright infringement in 2000 by record labels including Metallica and Dr. Dre. The document outlines the plaintiffs' and defendants' arguments in the case. It describes how the district court found Napster liable and issued an injunction, which was later affirmed by the Ninth Circuit Court of Appeals. Napster was eventually shut down in 2001 due to this legal action.