Final answer:
When the RAIC reader indicates verification failure, the security guard must follow the established security protocols to either verify the individual's identity through alternative means or deny access and alert a supervisor.
Step-by-step explanation:
If a portable RAIC reader states verification failed, it means that the system was unable to verify the credentials of the individual trying to access a secure area. In such a situation, the security guard should follow the security protocol outlined for verification failure, which typically involves taking alternative measures to verify the individual’s identity or denying access and possibly alerting their supervisor or security control. If after alternative methods the identity cannot be verified, the person should not be allowed to enter the secure area until their credentials can be properly authenticated. Prompt and appropriate actions are crucial to maintaining security integrity.