Answer: A breach of confidentiality
Explanation:
According to the given incident, An investigator is basically obtaining the HIPAA authorization for the purpose of reviewing all the records related to the medical status.
Then, he uses his laptop identifying the subject in the database for reviewing the medical information.
But someone stolen his laptop so his incident is basically constituting about a breach of confidentiality. It is the process of violating the confidential or the unauthorized data without any consent in the military, medical filed and the different types of other legal professions.
Therefore, A breach of confidentiality is the correct answer.