As a part-time private investigator, your responsibilities mean you investigate suspicious activity and fraud using research, surveillance, and other technical skills. Because you work for private individuals, you can identify potential wrongdoing or suspicious behavior, but you have no right to arrest or prosecute someone because you do not work for the government. You might work for an individual or even a company, and each job requires you to perform different duties depending on the details of the case, the information needed, and the ultimate goal of the project. In some cases, you present your findings to a client or employer, and in other cases, you may present evidence in court.