A subject is a person who is the focus of the investigation at hand. Commonly. Depending on the nature of the investigation, several suspects may be the focus and it will be the private investigator’s role to determine which ones or if all them should be considered for the rest of the case. For example, in cases of infidelity, the subject of the investigation will be the cheating husband or wife. Sometimes we label the suspects of our investigations “persons of interest”.
