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eInvestigator.com is an online research and education resource for professional private investigators, detectives, police officers, process servers, and security experts. Also, it’s a great resource for anyone interested in using investigative search tools, websites, OSINT, and databases to uncover data and information.

The Police and Law Enforcement section has a collection of helpful articles and blog posts related to law enforcement work. Here, you can learn what it takes to become a police officer and where to get the training and education you need. Plus, learn about the equipment, weapons, and vehicles officers use in the line of duty.

Police 10 Codes

List of Police 10 Codes

What are Police 10 Codes? Police 10 Codes are signals police officers, law enforcement officials, and government agencies use to talk in two-way radio communications....
How to get a police report

How to Get a Police Report

What is a Police Report? People file a police report with law enforcement for various reasons. For example, domestic disputes, traffic accidents, burglaries, home invasions, fraud,...

Private investigators, law enforcement officers, and intelligence agents use a variety of computer software, online services, OSINT tools, and mobile apps during the investigative process.

Private Investigator software

Private Investigator Software

Learn how to use Private Investigator Software, Apps, and Online Services Technology plays a key role in any investigation business. Detectives use a combination of...
Mobile phone spy software

Best Cell Phone Trackers and Mobile Phone Spy Software

What is Mobile Phone Spy Software? Mobile Phone Spy Software is a hybrid software and monitoring service that tracks caller activity on mobile devices, cell phones,...

Detectives in all industries use software programs like case management software, databases, productivity tools and more to help their agency operate more efficiently. In addition, professional detectives and intelligence agents use online services to conduct research, run background checks, and search public records databases. Then, they pull reports and analyze data to find missing persons and uncover the truth about people. Also, private eyes use specialized applications (or apps) on their mobile devices to search for information.

Some cases require the use of hi-tech surveillance equipment, sometimes referred to as spy gear. Sleuths and gumshoes who provide surveillance services need to be familiar with a wide range of electronic gadgets. For example, devices such as video cameras, binoculars and night vision goggles, audio listening devices, bugging and debugging equipment, drones, and many more.

Surveillance equipment

Surveillance Equipment and Spy Gear for Investigations

Surveillance equipment includes any equipment, gadget, or device used to conduct various types of surveillance, counter-surveillance, and investigations. The equipment is most often used to perform...
Audio Amplifiers

Audio Surveillance Equipment for Investigators

Overview of Audio Surveillance Tools Audio surveillance equipment is used by intelligence agencies, law enforcement, and private investigators to monitor and record subjects in various...

Review the articles in our spy gear section to learn more about the types of surveillance tools and electronic equipment a private investigator might use to catch a cheating spouse, track down a missing person and gather information for a case.

If you’re a naturally curious snooper, you love information. Be sure to check out our extensive Lists of Lists category. You’ll find lists to help you with online investigations such as Search Engines, Social Networks, State Information, and more.

List of the best search engines

Best Search Engines for Private Eyes: A Comprehensive Guide

This article provides an overview of search engines and a list of the best search engines. An internet search engine is a searchable online...
List of Social Media Networks

Social Media Surveillance: Platforms Every PI Should Know About

Private investigators are often called upon to investigate cases that involve social media. For example, harassment, fraud, hacked accounts, identity theft, catfishing, stalking, etc....
List of the best email newsletters

List of the Best Email Newsletters

This article provides a list of the best email newsletters. I decided to compile this list when I started doing research for my own...

Detectives and private investigators use crime scene investigation and forensic science techniques, tools, and equipment to explore crime scenes. They excel in collecting, transporting, and preserving evidence, data, and information. Additionally, PIs utilize forensic labs for analyzing fingerprints, examining DNA, and evaluating firearm ballistics data.

Search Public Records

Run an online public records people search and find out the real truth about anyone. Learn how to search online databases and OSINT websites to track down an old friend, reconnect with a lost love, or find a missing person.

Join the Private Investigator Directory and connect with potential clients who need investigative services all over the world. Use it to promote your business services and your firm’s investigative expertise, drive traffic to your website, and get more cases.

Get a PI License

Interested in becoming a private investigator? Learn how to get a license with our state-by-state licensing guide. You’ll find everything you need to pursue an exciting career in the investigation industry. Learn the state requirements, how to apply, how to join an association, where to get training, and more.

Influential true crime TV series, police dramas, and detective shows have sparked the interest of individuals, inspiring them to embark on dynamic careers as police officers or professional private detectives. Explore our compilation of the Top 50 Best Crime TV Series and Detective Shows, featuring insightful overviews of classics such as Columbo, Barney Miller, Magnum P.I., and more.

List of the best crime TV series and detective shows

List of the 50 Best Crime TV Series and Detective Shows

This is a list of the best crime TV series and detective shows. Many people likely get their original inspiration to become a private...
Simon & Simon tv show

Simon & Simon TV Show Season Episodes on DVD

Series Overview Simon & Simon is an American private detective television series aired on the CBS television network. The popular series stars Gerald McRaney and...

A list of useful Open Source Intelligence (OSINT) tools and resources. Includes search tools to help you find public records, verify facts, search social media sites, reverse search images, uncover government data, and more.

Learn how to avoid becoming a victim of the latest fraud, scams, and schemes. Learn what to look for, protect yourself, and report crimes to the proper authorities.

Training and Education

Explore our curated selection of training and educational resources designed for both seasoned professionals and entry-level associates. Discover a range of investigation schools, academies, training classes, home study courses, and distance learning programs. Acquire the essential knowledge and skills to excel as a professional private investigator, and achieve your degree, diploma, or certificate. Additionally, access educational materials such as recommended books, study guides, and exam preparation resources.

Mobile Spy Software apps help investigators covertly tracking the activity and location of a mobile phone or tablet. Also, parents use cell phone trackers to keep an eye on their children. Plus, there is growing interest and use among employers and suspicious spouses. Read our reviews of the best phone monitoring solutions like mSpy, FlexiSpy, Highster Mobile, etc.

GPS Phone Tracker Pro App

The GPS Phone Tracker Pro is one of the best apps for tracking someone's location. Essentially, this is a full-featured Android app that allows...


This article provides an overview of a monitoring application called FlexiSpy. If you do a Google search for FlexiSpy, you'll see the developer's website...

Expand your collection of reference and educational materials about the private investigation industry with our recommended books. Our library of private investigator books encompasses a wide range of resources, including how-to books, textbooks, reference manuals, audiobooks, true crime podcasts, and magazines. Take advantage of these valuable materials to acquire new skills and techniques for your journey in the field.

Surveillance Books for Private Investigators

In this article, I'll briefly overview surveillance and list some popular surveillance books. What is Surveillance? Surveillance is the systematic monitoring, observation, and collection of...

Process Server Books and Reference Guides

What is Process Service? This article provides an overview of process server books. But what is process service? Process Service, or Service of Process, is...

We recommend that private investigators join and participate in local, state or nationwide investigation associations

  • Stay on top of legislative changes in the industry
  • Get access to training and development opportunities
  • Network with other detectives and industry experts
  • Create new business and referral opportunities