According to 18 U.S.C. § 1956, the money laundering statute, the property involved in a financial transaction must represent the proceeds of some form of unlawful activity, which is defined as a specified unlawful activity (SUA). SUAs include over 250 crimes in six categories, such as RICO predicate offenses, certain offenses against foreign nations, acts constituting a criminal enterprise under the Controlled Substances Act, and federal health care offenses. Therefore, in order to pursue a money laundering conviction, the government must prove that at least one SUA was committed and that the property involved in the transaction was derived from that SUA.
References:
* 18 U.S. Code § 1956 - Laundering of monetary instruments, (a)(1) and (7).
* 957. Money Laundering-18 U.S.C. §§ 1956 & 1957, first paragraph.
* Specified Unlawful Activities (SUA), first paragraph.

The Wolfsberg Group is an association of 13 global banks that aims to develop frameworks and guidance for the management of financial crime risks. The group started as a meeting of banks in 1999 to address anti-money laundering (AML) in private banking, which carries an increased degree of risk from a money laundering perspective. In the course of discussions, they articulated principles that reflected uniformly high standards for this client segment. These principles became the first guidance published by the group under the name Wolfsberg Principles.
References:
The Wolfsberg Group - Institute on Governance
Wolfsberg Group - Wikipedia
The Group first came together in 2000 at the Wolfsberg castle in Switzerland, accompanied by representatives of Transparency International, to draft anti-money laundering guidelines for private banking

Money laundering through real estate transactions involves integrating illicit funds into the legitimate financial system while providing a relatively "safe" property investment. In this context, the most relevant factor to examine is the beneficial owner of the asset. Identifying the true owner behind a property helps uncover potential money laundering schemes. Criminals often use third parties, shell companies, or complex ownership structures to distance the transaction from the source of illicit funds. Investigating the beneficial owner's identity is crucial for detecting and preventing real estate-related money laundering12.
References:
Understanding money laundering through real estate transactions
What Is Money Laundering? - Investopedia

The Egmont Group is a global network of Financial Intelligence Units (FIUs) that aims to enhance the capabilities and cooperation of its members in combating money laundering, terrorist financing, and other financial crimes. The Egmont Group supports its FIU members by helping them to expand and systematize the exchange of financial intelligence and information, improve expertise and capabilities of personnel, and enable secure communication with one another12. The Egmont Group does not issue due diligence models for financial institutions, as this is the responsibility of national regulators and standard-setting bodies. The Egmont Group does not issue strategic products for law enforcement agencies and FIUs, as this is the role of other international organizations such as the Financial Action Task Force (FATF) and the United Nations Office on Drugs and Crime (UNODC). The Egmont Group does not expand the ability of FIUs to enforce laws and exchange information globally, as this depends on the legal and operational frameworks of each FIU and the bilateral or multilateral agreements they have with other FIUs.
References:
Egmont Group
Working Groups - Egmont Group
Overview of the Egmont Group of Financial Intelligence Units
The Egmont Group of Financial Intelligence Units | FinCEN.gov
Egmont Group - Qatar Financial Information Unit

The most important consideration when deciding whether to recommend closing the account is the institution's anti-money laundering policy. This is because the policy should provide clear and consistent criteria for account closure decisions, based on the risk assessment, the nature and severity of the suspicious activity, the customer due diligence information, and the legal and regulatory obligations of the institution.
The policy should also ensure that the account closure process is independent, objective, and transparent, and that it does not compromise the confidentiality of the suspicious transaction report or the investigation.
References: =
* ACAMS Study Guide for the CAMS Certification Examination, 6th Edition, Chapter 5, Section 5.4.2, page 1971
* ACAMS CAMS Certification Video Training Course, Module 5, Lesson 5.4, video time 9:00-10:302
* ACAMS CAMS Certification Practice Exam, Question 145, page 2863