If the documents that Chaney wants him to find actually existed and haven't been destroyed, they'll be somewhere in the files of Pharmomedic. But finding them in the massive files of a large corporation would be a huge task. On the other hand, suppose they've turned copies over to their law firm, Jenkins and Petry? If the defense attorneys knew those documents existed and didn't turn them over as part of the discovery process, then they have violated the legal profession's canon of ethics, and violated the law, as well. In Pete's book, that makes any attack fair game.