San Jose

Trusted private detective in San Jose. Tristar Investigation provides licensed, discreet services for personal, legal, and corporate clients.
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Looking for a private detective in San Jose, CA, you can rely on? For nearly 30 years, individuals, businesses, and attorneys across the Bay Area have turned to Tristar Investigation as a leading private investigation firm. Whether you need support for personal concerns, legal cases, or corporate matters, our licensed investigators deliver fact-based results while protecting your confidentiality. From Downtown San Jose to Willow Glen, Almaden Valley, and Santana Row, we’ve guided countless clients in uncovering the truth, protecting their interests, and restoring peace of mind.
Private Investigation Services in San Jose
Choosing a detective agency in San Jose means finding a team with proven experience and deep knowledge of local dynamics. Tristar Investigation works with attorneys, private citizens, and organizations on a broad range of cases. Here are some of the key services we provide:
Employment Law Support for Plaintiff Attorneys

San Jose’s fast-moving workforce brings frequent employment law disputes. We assist law firms with Class Action and PAGA wage/hour claims, class action suits, and discrimination cases.

  • Identify and interview potential plaintiffs and class representatives (including bilingual outreach to Spanish-speaking employees).
  • Provide spreadsheets with employee details to support active cases.
  • Deliver court-ready reports backed by interviews and records.
  • Locate missing plaintiffs or class reps and reconnect them with legal teams.
This work ensures attorneys have the evidence they need and workers secure the justice they deserve.
Asset & Financial Investigations
We reveal:
  • Undisclosed bank accounts, real estate, and vehicles.
  • Business holdings or investments hidden from disclosure.
  • Liabilities that could affect recovery.
With this information, attorneys and clients make informed decisions and avoid costly mistakes.
Subrosa Surveillance for Defense Attorneys
Insurance defense lawyers hire us to verify injury claims. Using discreet surveillance (subrosa), we document whether a claimant’s activities match their reported limitations.
  • Injury fraud: Filming individuals exaggerating or faking injuries.
  • Workers’ comp: Monitoring claimants to confirm or disprove job-related disability
From golfing to home repairs, we capture video evidence that exposes the truth.
Process Service & Legal Support
Serving subpoenas or court documents in San Jose can be challenging, especially when individuals actively avoid service. To overcome these obstacles, we take a thorough and strategic approach. Our team begins by researching accurate addresses and alternate locations to ensure we know where to find the subject. We also identify vehicles and observe behavioral patterns that may provide opportunities for contact. When necessary, we conduct stakeouts and remain on-site until the individual is successfully served. Through persistence and attention to detail, we make sure deadlines are met and cases continue to move forward without unnecessary delays.
Probate & Estate Investigations
When estates enter probate, attorneys often require assistance in locating heirs. This process involves conducting heir searches to identify and confirm relatives who may be entitled to inherit. In cases where heirs cannot be found, due diligence is carried out, and formal declarations are provided to document the thoroughness of the search process. These efforts play a crucial role in ensuring that estates are managed fairly while minimizing the risk of future disputes.
Accident & Personal Injury Investigations
Quick action is critical after an accident, and our investigators move swiftly to secure essential evidence. They conduct video canvasses to locate nearby security footage, take witness statements through both in-person and cost-effective telephonic interviews that are recorded and transcribed, and assess liability directly at accident scenes. By gathering this evidence promptly and thoroughly, we strengthen claims and provide victims with the solid foundation they need to pursue rightful compensation.

Need more details? Contact us

When uncertainty weighs on you, having the right private investigator makes all the difference. Contact Tristar Investigation today for a free, confidential consultation, and let our San Jose experts help uncover the truth you deserve.
Expanded Services for Every Need
Tristar Investigation goes beyond core casework with specialized services for families, businesses, and attorneys.
Surveillance & Monitoring
  • Spousal/Domestic Surveillance: We conduct discreet surveillance for spouses or family members to confirm suspicions, reveal hidden activities, and provide clear evidence you can rely on.
  • Cheating Spouse: If you suspect infidelity, our investigators collect photographic and video proof, along with detailed reports, to help you make informed personal or legal decisions.
  • Subrosa Surveillance: Often used in insurance or legal cases, this undercover surveillance uncovers hidden lifestyles or false claims without alerting the subject.
  • Injury Surveillance: We record the daily activities of individuals claiming injury to verify if their behavior matches their stated limitations, helping to prevent fraudulent claims.
  • Business Surveillance: We offer customized business surveillance to monitor employee behavior and safeguard company assets, reducing risks and preventing losses.
Family & Custody Matters
  • Child Safety Investigations: We investigate concerns of neglect, abuse, or unsafe environments to ensure children’s well-being and provide detailed findings for peace of mind or legal use.
  • Runaway Teen Location: Our team uses advanced investigative methods to locate runaway teenagers quickly and safely.
  • Missing Person Searches: Whether recent disappearances or long-term cases, we work tirelessly to locate missing loved ones.
  • Divorce Investigations: We gather evidence on hidden assets, infidelity, and behavior patterns to support divorce cases with credible proof.
  • Relative & Contact Reconnection: We help you reconnect with biological relatives, lost friends, or estranged contacts through professional search techniques.
Fraud & Scam Investigations
  • Fraud & Scam Exposures: We uncover internet-based or in-person scams by documenting deceptive practices and identifying perpetrators.
  • Workers’ Compensation Fraud: Our surveillance and documentation expose fraudulent injury or disability claims.
  • Bankruptcy & Foreclosure Fraud: We investigate suspicious financial activities tied to bankruptcy filings or foreclosure processes.
Background Checks & Due Diligence
  • Personal Background Screening: We verify employment, education, criminal records, and personal history for accuracy and safety.
  • Partner/Tenant Checks: Our team screens partners, tenants, and associates to ensure trustworthiness before major commitments.
  • Corporate Due Diligence: We verify ownership structures, financial health, and compliance to protect your business interests.
  • Executive Background Investigations: We conduct SEC-level checks on executives to confirm credentials, integrity, and legal standing.
Legal Support Services
  • Witness Location & Interviews: We locate witnesses and conduct professional interviews to secure valuable testimony.
  • Sworn Witness Statements: Our investigators prepare and document legally sound witness statements.
  • Subpoena & Court Paper Service: We serve legal documents efficiently and provide proof of service.
  • Difficult Subject Handling: Our team is skilled at locating and serving evasive or uncooperative individuals.
Asset & Financial Investigations
  • Property & Asset Location: We trace real estate, vehicles, and bank accounts linked to individuals or corporations.
  • Asset Recovery Support: We provide investigative support to help recover stolen or missing property and funds.
Corporate & Employee Investigations
  • Employee Theft & Fraud Investigations: We discreetly uncover theft, embezzlement, and fraud within organizations.
  • Intellectual Property Protection: We monitor and document IP theft or misuse to protect your business assets.
  • Competitor & Market Intelligence: Our intelligence gathering offers insights on competitors and market trends.
  • Loss Prevention: We help organizations identify risks and implement strategies to prevent financial losses.
  • Workplace Dispute Documentation: We record workplace conflicts and policy violations to support HR or legal action.
  • Employee Verification: We deliver verified employee records and lists for compliance or legal proceedings
Specialty Investigations
  • Bilingual Investigators: We provide Spanish-speaking and bilingual investigators to handle diverse claims effectively.
  • On-Scene Accident Investigations: Our experts document accidents thoroughly at the scene to preserve critical evidence.
  • Insurance Claim Verification: We investigate accident claims to confirm or challenge their validity, ensuring fair outcomes.
Whether you require a discreet investigator in San Jose or statewide resources, Tristar Investigation delivers with precision and professionalism.
Why Choose Tristar Investigation?
With almost three decades of investigative success, Tristar Investigation is trusted by individuals, businesses, and attorneys alike.
Our San Jose cases are handled with the same precision that has earned us recognition from CNN, the Los Angeles Times, and other respected outlets.
At the heart of our work is confidentiality. We know many cases involve sensitive matters, so we use secure communication and discreet methods to protect your privacy at every step. Here’s what you can always expect from us:
Here’s what you can always expect from us:

Our Commitment to You

We only accept cases where we know we can provide results. From the start, you’ll get a straightforward process, plain-language reporting, and consistent follow-up to ensure satisfaction.
Every matter is handled with discretion and respect. Contact us today by phone or email to take the first step toward answers and peace of mind.