A private investigator, private detective, investigation agent or interrogator, is somebody who is able to hire people, teams or NGOs to undertake private investigative service. Private investigators also work for lawyers in criminal and civil matters. The work that is performed by a private investigator includes investigations, searches, surveillance, elicitation, evaluation of information, and the use of covert methods and techniques. Private investigators may use the services of the police and other officials in executing their duties. You can get additional information at  view publisher site

Generally speaking, there are two types of people who may hire private investigators; one is the person who wants to spy on his/her spouse and obtain vital information about his/her cheating, while the other is the person who wants to investigate someone for which he/she has no evidence and for which he/she needs proof through which to arrest the suspect. In case of spying, the person hires the services of a private investigator without the knowledge and consent of the person concerned. Such a crime occurs when a husband or wife hires a private investigator to spy on their spouse. In order to carry out such an investigation, the husband/wife needs to get written permission from the suspect in order to collect evidence or to hire detectives to accompany them to the places where they will carry out the spy investigations. In case of hiring detectives or agents without the authorization of the suspects, a violation of federal law is one of the penalties that will be faced by the suspect. Violation of federal law carries a prison sentence, fines, and in some cases, flogging.

In surveillance, on the other hand, such agents are hired by a private investigator to observe the behavior of employees and customers at specific places. Some private investigators specialize in monitoring the behavior of business establishments. Surveillance includes video recording of all activity at a place, audio recording, and video monitoring of all public places. The former is considered as real surveillance, whereas the latter does not require any physical trespass and can take place almost anywhere. When you consider all these aspects, it is clear that both surveillance and private property rights are different and have their own sets of limitations.