There are many ways that a federal investigation may be commenced. Typically, such investigations commence when a crime is reported. If a bank is robbed, the Federal Bureau of Investigation (FBI) will usually learn about it immediately. A report of a crime is made, an agent is assigned to investigate such report and, if it appears that the report is accurate, and policy considerations so dictate, a federal investigation commences. However, and as might be imagined, federal investigations are not always commenced after a crime is known to have occurred. Sometimes investigations are commenced based upon intelligence gained from police informants, tips from anonymous sources and/or by suspicious circumstances giving rise to federal inquiry.