A private investigator or private detective is a person who secretly follows and observes persons in public places for the purpose of witnessing behavior and collecting evidence of any illegal or improper activities (photos, videos, etc.). During the divorce process a spouse who suspects their spouse of cheating (adultery) or other improper or illegal behavior may hire a private investigator to follow or “tail” the other spouse.

In Louisiana, private investigators are regulated under state law and must be licensed to legally conduct surveillance and investigative work. The Louisiana State Board of Private Investigator Examiners (LSBPIE) is the governing body that issues licenses to private investigators. To become a licensed private investigator in Louisiana, individuals must meet certain requirements, including passing an examination and a background check. When hired during a divorce process to investigate a spouse for adultery or other improper behavior, private investigators must operate within the bounds of the law. This means they are permitted to observe and collect evidence in public places, but they must not trespass on private property, engage in illegal wiretapping, or violate any state or federal laws regarding privacy. The evidence gathered by private investigators can be used in court proceedings, provided it has been obtained legally. It's important for anyone hiring a private investigator in Louisiana to ensure that the investigator is properly licensed and adheres to legal and ethical standards.