Money laundering enforcement operations in the USA and abroad have developed in the past decade from the simple use of informant information to the sophisticated analysis of voluminous, complex financial transaction arrays. Traditional investigative techniques aimed at uncovering patterns consume numerous man-hours. The volume of these records and the complexity of the relationships call for innovative techniques that can aid financial investigators in generating timely, accurate leads. Data

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... ing techniques are well suited for identifying trends and patterns in large data sets often comprised of hundreds or even thousands of complex hidden relationships. This paper explores the use of innovative data mining methodologies that could enhance law enforcement's ability to detect, reduce, and prevent money laundering activities. This paper provides an overview of the money laundering problem in the USA and overseas and describes the nature and scope of the money laundering problems. It reviews traditional approaches to financial crime investigation and discusses various innovative data mining and artificial intelligence-based solutions that can assist financial investigators.