round ammunition in a person's home. >> and local authorities asked the fbi to conduct their own analysis of kopenheffer's computers after the initial search of hard drives turned up nothing. a document is not all in one place on a disc drive. pieces of it are stored in different sectors of a drive. when a document is deleted, it's not erased from the hard drive. instead, the space occupied by that document is labelled available to reuse if necessary. >> by going through that disc mathematically, finding the proper clusters based upon the known interleaving of the drive, you can piece together an entire