Answer: Embezzlement
Step-by-step explanation:
Embezzlement is the act of concealing assets in order to steal such asset. In this case, the bank manager has been entrusted with customers funds but rather, he stole some of the funds and used it for his own purpose.
Embezzlement is a form of financial fraud. Examples of embezzlement are lawyers stealing funds from client's account, husband stealing funds from a joint account with his wife or a financial investor stealing investor's funds using it for personal use.