ILJ developed a report for the National Institute of Justice on the experiences of local police departments and prosecutors' offices who have selected and trained full-time personnel to investigate and prosecute computer crimes. These crimes include unauthorized access to business and government computers via telephone lines (hacking), destruction of data and programs in a system ("Trojan horse"), modification of proprietary software for sale (software piracy), obtaining long-distance account numbers to avoid telephone charges, and altering data in a system in conjunction with other illegal acts (such as fraud and embezzlement schemes). The report also discussed recent changes in federal and state statutes governing computer crimes. Specific cases were documented to illustrate the various techniques and problems in investigating computer crimes.