Top-Rated Private Investigator in New Jersey

Private investigators who deliver the proof you need to move forward.

For over two decades, Magnum Investigations’ licensed detective team has provided court-admissible video surveillance for cheating spouse/infidelity, child custody, and alimony/co-habitation cases — serving NJ & PA with a free 30-minute consultation.

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Cheating Spouse

Surveillance specialists trained to remain undetected.

If you hire a private investigator in New Jersey to catch your cheating spouse, you can’t afford for the investigator to get caught. Most other companies are one-man operations and generally get caught.

Infidelity Investigations

Child Custody

A 92% success rate with NJ & PA child custody investigations.

The combination of Law Enforcement background, understanding of case law, Specialized Surveillance Skills, compassion and understanding of the emotions that the client is dealing with is a recipe for success that no other company has.

Child Custody Investigations

Private detective conducting surveillance in his car

Alimony/Co-habitation

Why pay your ex alimony if she/he is living with a new partner?

Those who invest in a Private Detective for Alimony usually end up saving tens, and sometimes hundreds of thousands of dollars with an Alimony Reduction or a Revocation as a result of our co-habitation investigations.

Co-habitation Investigations

Why Choose Magnum Investigations?

New Jersey’s Premier Private Detective Agency

Watch the video below to learn more about our company.

Private investigator performing surveillance in a car

Magnum Investigations is the leading private investigator firm in New Jersey, providing professional detective services throughout NJ and PA. Our team of experienced private investigators and detectives specializes in infidelity cases, child custody matters, and alimony investigations.

When you need a private investigator in New Jersey, we deliver reliable evidence and professional results.

Where Do You Conduct Investigations?

Click the images below to see more details on our service in each state:

NJ Private Investigator

Pa Private Investigator

Our NJ private investigators have likely conducted surveillance near you since we are licensed in New Jersey and Pennsylvania.

We also travel if that presents the best opportunity to uncover the truth and provide the evidence you need.

Please view our gallery of surveillance photos below for a glimpse into our day-to-day operations and the results you can expect after you retain our services.

Surveillance Photos

How Do I Hire a Private Investigation Company?

Use the navigation menu to learn more about our specific detective services.

Then, you may call our toll-free phone number to speak with an investigator licensed in New Jersey & Pennsylvania.

We DO NOT discuss rates or investigations via email.

The owner of Magnum Investigations will personally speak with you during the initial consultation before assigning a professionally trained in-house private investigator to handle your case needs.

IMPORTANT: There are many companies offering Investigative Services who are NOT Licensed Investigators and are therefore operating illegally. Therefore be careful and demand that the company provide you with their License Number and then verify it through New Jersey at (609) 633-9352. In PA you must contact the Clerk of Courts in the County where the company claims to be located.

Free 30-Minute Consultation with NJ’s Best Private Investigator

(800) 688-9230

Private Detective Surveillance Case Study

Download our e-book “Surveillance Case Study: Southern Rendezvous” below:

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I am writing this review to express my sincere gratitude to Chris for all that he did for me during one of the most stressful and painful times in my life.

His professionalism and guidance, at a time when I questioned myself, helped me to accept my ex-husband’s affair and then begin to move on with my life.

Because of Chris’ diligent surveillance, I have no doubt about the decisions I made afterwards. He provided me with irrefutable proof that strengthened my resolve. He even called to check in on me periodically afterwards.

At a time when I felt like my whole world was tumbling down around me, his concern was truly appreciated.

I highly recommend his services and while I hope never to need him again, I will be sure to call him if need be.

Thanks so much, Chris!

Michelle B.

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