Once thought to be limited to hackers breaking into computer systems, stealing money by computer, and destroying credit reports, computer crime now encompasses any crime in which a computer is used either in its commission or as a repository of evidence. As with other types of evidence, protocols have been established for proper seizure and processing of computer evidence. It is imperative that the preservation of computer evidence and the recovery of computer data follow strict procedural guidelines to ensure its accuracy. The forensic processing of a computer system requires special training. Since computer data cannot be seen, special language must be included in search warrants and affidavits to allow the seizure of computer equipment and peripherals that might contain evidence. Further, given that computers can be used to store evidence in all types of crimes, all law enforcement officers should be skilled in proper methods to seize computer systems, including diskettes and other forms of magnetic media. Officers selected for investigations that involve computer evidence should have a good understanding of network operating systems, telecommunications, and various types of computer hardware and software. In addition, they must receive training in the use of special software programs that have been developed for law enforcement, as well as in legal issues specific to computer evidence. As technology changes, these officers will require additional training. Not only must law enforcement be able to investigate and prosecute computer crimes, it must have the knowledge base necessary to protect both its constituents and its own systems from unauthorized access, destruction of data, compromise of investigative information, and confidentiality of citizen information.