There are several agencies that investigate white collar crimes. On the federal level these agencies are:
Federal Bureau of Investigation
Securities and Exchange Commission
Internal Revenue Service
United States Treasury
United States Postal Service
U.S. Citizenship and Immigration Service
Drug Enforcement Administration (DEA)
At the state level white collar crimes are often investigated by special task forces within a local law enforcement agency. They may also be investigated by the local tax collection agency.
Many investigations are started from civilian tips, accountants and employees of local banks that notice discrepancies in the records.
Posted in: White Collar Crimes