As a private investigator intern, your job is to participate in training and help collect evidence as you investigate topics for private clients. Many private investigator firms focus on specific areas. For example, you may focus on security matters, fraud, or journalistic research as part of this experience. Private investigator interns often use this role to help get the experience necessary for a license. Your duties may involve gathering evidence for a case, helping process paperwork, or accompanying other investigators on excursions. There are legal limits on what investigators can do to find information, so learning and following those is essential to your success in this internship.