In a report for the National Institute of Justice on the experiences of local police and prosecutors in investigating and prosecuting computer crimes, ILJ described fraud and embezzlement using computers and illegal programming techniques, such as trap doors, logic bombs, and salami techniques. The report discusses recent changes in federal and state statutes governing computer crimes. ILJ identified police departments and prosecutors that established computer crime investigation units and were active in prosecuting cases. These agencies were visited to obtain more information on the approach used. Specific cases were documented to illustrate various techniques and problems in investigating computer crimes.