What should you check for when a police officer requests access to personal participant information?

When a police officer requests access to personal participant information, ensuring that the officer has proper identification is crucial. This step is essential for validating the legitimacy of the request and maintaining the security and privacy of participant information. Proper identification helps confirm that the officer is who they say they are and that they have the authority to access such sensitive data.

While other options may involve important procedures—such as checking request legitimacy against participant consent or consulting a supervisor—these steps cannot even be rightly followed without first verifying the officer's identity. This acts as a fundamental safeguard against unauthorized access to personal information and protects the rights and confidentiality of participants.