As a part-time background investigator, you work with law enforcement or a private agency to investigate a current case or delve into the background of potential job candidates as part of a pre-employment check. You use a myriad of resources for finding the necessary information, including court and public records. Duties often include interviewing people, reviewing social media, and conducting surveillance to provide the necessary evidence for a clearance report. Some employers hire these individuals to look for potential employee fraud or theft. Your responsibilities require you have a thorough knowledge of privacy law, as you are not the police and may only operate in a civil capacity. Part-time hours often extend to nights and weekends.