The junior account manager should file a suspicious transaction report (STR) with the Financial Intelligence Unit (FIU) of Country A, as he has reasonable grounds to suspect that the customer is involved in money laundering or terrorist financing. The customer's attempt to deposit a large sum of cash, followed by a series of smaller wire transfers from a high-risk jurisdiction, indicates a possible case of structuring or smurfing, which are techniques used by criminals to avoid detection and reporting thresholds. The junior account manager should not close the account, as this could alert the customer and disrupt the investigation by the FIU or law enforcement. The junior account manager should also not notify the anti-money laundering specialist of his bank, as this could create a conflict of interest or breach of confidentiality, unless the bank's policy requires such notification. The junior account manager should also not offer the customer a more secure method of depositing, as this could be seen as facilitating or condoning the customer's illicit activities, or exposing the bank to legal or reputational risks.
Reference:
CAMS Study Guide, pages 97-98, 103-104, 107-108.
CAMS Exam Questions and Free Practice Test, Question 272.