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Professional Private Investigator Services in Philadelphia
Tri State Detective Agency is a professional private investigation firm dedicated to delivering discreet and effective investigative solutions across Philadelphia, Pennsylvania, New Jersey, and Delaware. Our team of licensed investigators brings decades of combined experience in law enforcement, military intelligence, and corporate security to every case. We specialize in infidelity investigations, missing persons cases, digital forensics, and surveillance, utilizing cutting-edge technology and proven investigative techniques. Our commitment to client objectives drives our 24/7 operational approach, ensuring personalized attention to every case. With a diverse team of male and female investigators, including former law enforcement officers and military personnel, we provide comprehensive investigative services tailored to individual client needs.

Our state-of-the-art reporting system allows clients real-time access to case updates, photographs, and video evidence. We maintain rigorous training standards and industry certifications to ensure our investigators remain at the forefront of investigative practices. Our success is measured by the resolution of our clients' cases and the trust they place in our capabilities. We operate with complete transparency, offering free initial consultations to discuss investigative strategies and expectations. Our reputation as one of Philadelphia's premier investigative agencies is built on consistent results and ethical conduct.
Services
Infidelity Investigations Missing Persons Digital Forensics Surveillance Services Background Checks Cyber Investigations Locates/Skip Tracing Court Research Accident Scene Diagrams Electronic Surveillance
Details
  • Year established: 2007
Highlights and features
  • Our investigators average over 30 years of combined experience in law enforcement and private investigation.
  • We provide 24/7 access to case updates through our secure online reporting system.
  • Our team includes former law enforcement officers and military personnel with specialized training.
  • We utilize state-of-the-art technology for digital forensics and real-time surveillance reporting.
  • We offer free initial consultations with licensed investigators for all case types.
Services
Infidelity Investigations
Our specialized team conducts discreet surveillance and digital monitoring to document infidelity cases. We employ advanced tracking technology and experienced investigators to gather admissible evidence while maintaining strict confidentiality. Clients receive comprehensive reports with photographic and video documentation through our secure online portal.
Missing Persons
We utilize exclusive databases and law enforcement networks to locate missing individuals across our tri-state service area. Our investigators combine traditional detective work with modern technology to trace persons through digital footprints, financial records, and social connections while coordinating with local authorities when appropriate.
Digital Forensics
Our government-approved specialists recover digital evidence from electronic devices using certified forensic tools. Services include cell phone data retrieval, cyberstalking investigations, and detection of illegal surveillance devices. We provide court-ready documentation of digital evidence with expert witness testimony available when needed.
Surveillance Services
We deploy experienced surveillance teams using state-of-the-art equipment for continuous monitoring of subjects. Our investigators employ vehicle tracking systems and covert observation techniques to document activities while maintaining operational security and legal compliance throughout Pennsylvania, New Jersey, and Delaware.
Background Investigations
Our comprehensive background screening services include criminal record checks, employment verification, and financial history investigations. We utilize specialized databases and physical field investigations to confirm identities and uncover relevant information for personal, corporate, or legal purposes.
People
Thomas Nixon Sr.
Founder
With nearly two decades in fugitive apprehension, Thomas Nixon Sr. brings extensive law enforcement experience and a criminal justice degree to his role as founder. His career includes solving high-profile cases and mentoring future investigators while maintaining active detective licensure.
John Miller
Investigator
Former military intelligence officer with over a decade of investigative experience. John specializes in risk assessment and complex case analysis while maintaining a strong focus on client satisfaction through meticulous attention to detail.
David Rodriguez
Criminal Investigator
12-year law enforcement veteran specializing in surveillance and tactical operations. David's expertise in conflict resolution and evidence collection contributes to successful case outcomes through strategic investigative approaches and field experience.
Mark Thompson
Lead Detective
Former police detective with distinguished career in evidence gathering and witness interviews. Mark's investigative instincts and ethical approach have resulted in numerous successful case resolutions through thorough documentation and attention to procedural details.
Jessica Hayes
Cyber Investigator
Specializing in digital investigations with law enforcement background. Jessica combines military training with technical expertise to address modern investigative challenges, delivering accurate results through comprehensive cyber evidence analysis and information gathering techniques.
Questions
What services does Tri State Detective Agency offer?
We provide infidelity investigations, missing persons cases, digital forensics, surveillance, background checks, and electronic surveillance services across Pennsylvania, New Jersey, and Delaware.
Are your investigators licensed and experienced?
Yes, our team includes licensed investigators with backgrounds in law enforcement, military intelligence, and corporate security, averaging over 30 years of combined experience.
How do you handle urgent cases?
We offer 24/7 emergency services and maintain immediate availability for time-sensitive investigations through our dedicated phone lines.
Can I access my case information online?
Yes, our secure web portal provides real-time access to reports, photographs, and video evidence 24 hours a day, 7 days a week.
Do you offer free consultations?
We provide free initial consultations with licensed investigators to discuss your case details and investigative options.
How quickly can you start an investigation?
We typically begin investigations immediately after case submission and receipt of necessary authorization documents.
Reviews (5)
David Reeder
Aug 06, 2021 Report
No I never heard back from anyone I called multiple times and never received a call back this company is a scam
Emily Severino
Mar 15, 2021 Report
This was my first time using a private investigator and if I ever need to again, this will be my first thought. I reached out and was answered within 10 minutes then when I sent the information I needed to send for my request, I got my results back in less than a half hour. I was so surprised at the speed and easiness of it and felt truly satisfied. Thank you!
Nix Naomi
Sep 13, 2020 Report
Unfortunately I felt the need to use his services. However the experience was was professional, and he made me feel very comfortable. He was on time, courteous, and I would use him again. Seemed to really care about my issues and concerns. Thanks!!!
Randolph Harrison
Aug 11, 2020 Report
Mr. Nixon is a kind and caring professional. I am extremely satisfied with my experience. I was updated during my case and he completed it in no time even though I live in Philadelphia. I would recommend him to all my friends and anyone looking for a high quality yet affordable investigator.
Lorraine Frawley
Jul 09, 2019 Report
Our company runs allot of background and asset searches through this company. Their services has always been top notch. And the information very helpful in debt recovery. I like the reports being full of information and often times they provide us with extra information that we didn't ask for. They really go above and beyond for us. They performed their task far beyond what you could ever imagine and their fees are very reasonable! I would definitely recommend their services to anyone inquiring about this type of service need. So if you are in need for investigative, surveillance Etc call... Tri