A law enforcement agency is reviewing a suspicious transaction report (STR) filed by a financial institution for suspici

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A law enforcement agency is reviewing a suspicious transaction report (STR) filed by a financial institution for suspicious activity on a clientג€™s account.
Subsequently, the agency requests further information.
Which supporting documentation might the law enforcement agency request from the institution to facilitate its investigation?

A. Previously filed STRs on the same customer
B. Account opening documents and account statements
C. Copies of promotional materials sent to the customer
D. A copy of the institutionג€™s STR policy and procedures