If it is necessary to terminate an undercover investigation, which action should not be taken?

When terminating an undercover investigation, it is crucial to maintain the safety of all personnel involved and to protect the integrity of the operation. Revealing the agent's identity would jeopardize not only the agent but also the investigation's outcomes and any evidence gathered.

Maintaining the secrecy of the agent's identity is vital for their safety, particularly if the subjects of the investigation might retaliate or seek retribution. Disclosing this information can lead to the agent facing significant risks or harm, as well as compromising the entire operation's findings. Thus, the agent's identity must be preserved until it's safe and appropriate to disclose it, if ever.

In contrast, actions like safely withdrawing the agent, ensuring their immediate extraction if needed, and salvaging data collected during the investigation are standard procedures. These steps help finalize the operation effectively and ensure that valuable intelligence or evidence is not lost, all while prioritizing the agent's safety.