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About IRS Criminal Investigation

Criminal Investigation is the law enforcement arm of the IRS.

IRS Criminal Investigation (CI) is comprised of approximately 2,900 Special Agents whose investigative jurisdiction includes tax, money laundering and Bank Secrecy Act laws. While other federal agencies also have investigative jurisdiction for money laundering and some bank secrecy act violations, IRS is the only federal agency that can investigate potential criminal violations of the Internal Revenue Code.

Compliance with the tax laws in the United States relies heavily on self-assessments of what tax is owed. This is called voluntary compliance. When individuals and corporations make deliberate decisions to not comply with the law, they face the possibility of a civil audit or criminal investigation which could result in prosecution and possible jail time. 

CI's top priority is the investigation of violations of the tax law. However, CI special agents lend their financial investigative expertise to money laundering and narcotics investigations conducted in conjunction with other law enforcement agencies at the local, state and federal levels.

Current Structure of IRS Criminal Investigation
History of Criminal Investigation
In July 1998, the Internal Revenue Service (IRS) Commissioner appointed Judge William Webster to direct an independent review of the Criminal Investigation (CI) function. Judge Webster assembled a task force to assess the CI function’s effectiveness in accomplishing its mission as the IRS’ criminal law enforcement arm.
In Summer 2002, CI Completes "Webster Report" Recommendations 
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