Which techniques would be most efficient for a complex investigation of unusual patterns of activity...

Perform a control and ownership assessment of the businesses involved, using the information available in the client files

Contact local law enforcement and request that they assist in the analysis and investigation

Review the information presented in the automated monitoring system's alert description and decline any future transactions

Contact the account manager and ask for the reasons behind the patterns of activity highlighted in the AML alerts

Use social media platforms to connect with the businesses and request details about the account activity