Welcome to Nationwide Legal
Providing Private Detective and Private Investigation Services to Businesses in California and Beyond... Contact Now
Professional Private
We are the leader in Child Custody, Infidelity, and Undercover Surveillance in the US... Contact Now


Our investigators cater to some of the most prestigious domestic and international law firms while maintaining one hundred percent anonymity. 


Our innovative team brings a diverse background of professional experience who are just as eager as you to find the peace of mind you are seeking. 


Unlike our competitors, complexity is our specialty. With a variety of agents in our arsenal, we’ve managed to assist businesses, small and large, in a wide variety of investigative needs.  

Our Mission

Here at Nationwide Legal Investigations, our mission is to take each and every case personal. Our investigative team is hand selected and we pride ourselves on not only getting results but assisting in changing peoples lives.

Marc J. Tropeano

we are experts at


Coporate & Securities

Our corporate partners rely on our expertise to protect them from employee dishonesty, financial inconsistency and unlawful activity.


Our undercover agents have mastered the art form of surveillance. We operate like phantoms and are never compromised.

Skip Tracing

A lost loved one, family member, business associate or a debtor can often get lost in the wind. Our grit and tenacity bring them back.


Our male and female agents can bend, twist and adapt to any situation. We deserve an Oscar for our performances.

Service of Process

They can surely run but they cannot hide. We hunt these people like prey. No one can compete with our 97.8% success rate.


Troubling times affect the best of us. We possess unique people skills that assist in custody, finances and your well-being.

Our People

what we are expert at

Why Clients Choose Us?

Missing Persons Found
Satisfied Clients
U.S. States We Cover
Hours Spent Listening to our Client's Concerns

Words From Clients

  • I would like to thank Marc and the rest of the Investigations team at Nationwide legal, for catching my (now) ex-boyfriend for cheating on me with a freaking gym trainer. Marc was very patient and attentive with me. He said that he will update me daily on anything that he finds. A week later, Marc sent me pictures and video of my ex grinding on his trainer. I’m so glad that I was able to get closure and move on with my life, thanks to Nationwide’s expertise. If you need a great investigator who will have your back from start to finish, then Marc and Nationwide Legal is the company to go with.

    Aira P.
  • Great company. I loved using their services. Always satisfied and happy. As a local San Gabriel law firm we really appreciate solid consistent work from our vendors. Nationwide Legal provides top notch services.

    Patricia R.
  • I’ve used Nationwide twice now, for different matters. They were extremely professional, reasonably priced, and responded quickly. The staff kept in close contact with me throughout the entire process, giving me updates through a very tough time. They kept me calm and solved both of my issues so quickly. The communication and reliability keeps me going back.

    Elena T.
  • Three weeks ago, I called Nationwide legal regarding doing a skip trace on my father. I Have not seen my father since I was eight months old. I needed to make amends for my personal life. So I spoke with Marcus and he was very informative with the pricing, as well as the details on what is needed to look for my father. It hasn’t even been 48 hours since the trace started and he was able to get me an address, as well as a phone number to contact my father. Now I’ve spoken with my father and we are going to meet each other for the first time this summer. I would like to thank Marcus and the investigations team, for their hard work and diligence on locating my father. If you need to find someone or track somebody down, then this company is the best at what they do.

    Moe S.
Previous Cases

Our Investigations


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