What must an officer do when another person's identity has been misused?

When another person's identity has been misused, the officer is required to notify both the victim and the Department of Public Safety (DPS) regarding the misuse. This is crucial because the victim needs to be made aware of the situation so they can take necessary precautions to protect themselves and address any potential damage caused by the fraudulent use of their identity.

Additionally, informing the DPS is essential as it helps in tracking and managing identity theft cases on a larger scale, ensuring that appropriate measures can be taken to prevent further misuse and to support the victim in any necessary steps for resolution. This coordinated response provides the victim with the necessary resources and support, which is a fundamental part of law enforcement's duty in protecting individuals from crimes like identity theft.

The other options do not fulfill the requirements of comprehensive communication or fail to involve important entities that can assist in addressing the issue adequately. Therefore, informing both the victim and DPS represents the correct and thorough response to this serious situation.