This document provides an overview of cyber crime investigation. It defines cyber crime as crimes where a computer is the target or tool used to commit an offense. Examples of cyber crimes include identity theft, hacking, and cyber terrorism. Cyber crime investigation uses computers and data as evidence, though it can be difficult due to remote and anonymous nature of crimes. Cyber crime investigators work for law enforcement, private companies, or as contractors recovering files, testing security systems, and investigating various cyber offenses. Specialized training programs are available to become a cyber crime investigator.