No matter what your level of technical sophistication, you will probably realize that most events involving a computer leave some trace of the behavior. Every action is recorded into a log somewhere, whether the work is email passing through, the act of logging into a computer, or visiting a web page. The more difficult thing to verify is who committed a given act since the use of a password does not guarantee that the password holder is the person typing it. Discuss how to trace and verify network evidence.