It was only a matter of time before musicians filed lawsuits against Napster for listing downloadable audio files of their records on Napster's cooperative database. Metal band Metallica was the first to announce a lawsuit on April 13, 2000, alleging the company "violated the law by committing continuing copyright infringements, unlawful use of digital audio interface device, and violations of the Racketeering Influenced & Corrupt Organizations Act (RICO)." Yale University, University of Southern California, and Indiana University were also named as defendants in the case, because they have allowed students to use campus resources to access Napster. MP3s have been controversial since the digital audio files first debuted, stretching the limits of copyright law. While Napster does not store any of the files at its site, it allows users to search Napster's database of MP3s which are kept on users's computers. (For more information on this controversy, see the January 27, 2000 Scout Report for Business and Economics).