A breach of trust occurs when an individual who has been entrusted with another person's assets or information fails to act in the best interests of that person, often resulting in financial loss or harm. This violation typically involves a fiduciary relationship, where one party is expected to act loyally and in good faith toward another. Breach of trust is a central concept in embezzlement cases, as it demonstrates the unfaithful management of resources that have been placed under someone's control.