San Diego

Private Investigator in San Diego, Tristar Investigation delivers discreet surveillance, asset checks, legal support & employment law investigations.
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If you need a dependable private investigator in San Diego, Tristar Investigation is a leading detective agency that has served individuals, businesses, and law firms for over 40 years. Whether your case is personal, corporate, or legal, our skilled team delivers clear and confidential results. Across the city, from La Jolla to the Gaslamp Quarter, we’ve helped countless clients uncover the facts, protect their interests, and find the peace of mind they seek.

Expert Services from a Private Investigator in San Diego
When selecting a PI in San Diego, it’s crucial to partner with a team that has deep local knowledge and a history of success. At Tristar Investigation, our licensed professionals are adept at managing a wide array of cases for attorneys, companies, and private citizens. Below are some of the primary ways our investigative services provide essential support:
Support for Labor & Employment Law
San Diego’s dynamic economy means that workplace rights are a significant concern for many. Our private investigators assist employment attorneys with cases centered on wage-and-hour disagreements, discrimination allegations, and unsafe work environment complaints. We:
  • Identify and interview potential participants for collective legal actions concerning wage disputes.
  • Gather records and statements to validate claims of missing wages or unpaid overtime.
  • Prepare court-ready reports that provide lawyers with the reliable evidence needed to build a strong case.
These actions empower employees to find justice and supply legal counsel with the factual basis to effectively pursue their cases.
Asset & Financial Investigations
For clients throughout San Diego, determining an opposing party’s financial capability is a critical step before initiating legal action or negotiations. Our detective agency excels at asset searches across the region. We can uncover:
  • Hidden properties, undeclared real estate, and secret bank accounts.
  • Concealed business partnerships and investments.
  • Debts and other financial liabilities that could influence a legal outcome.
By revealing these hidden assets, we enable clients and their legal teams to make informed choices and secure their financial interests.
Surveillance & Injury Claim Verification
In San Diego and the surrounding areas, exaggerated or fraudulent insurance claims are a significant problem. Our highly-rated investigators address these cases with total discretion, performing surveillance to confirm the authenticity of personal injury and workers’ comp claims. Using modern techniques, we obtain clear video and photo evidence to assess if a claimant’s physical activities are consistent with their reported injuries. This work helps insurance companies and defense lawyers save valuable resources and promotes integrity within the legal system.
Process Service & Legal Support
Serving legal documents in San Diego can be complicated, especially when individuals try to avoid being found. Our firm uses proven tactics like stakeouts, background research, and precise timing to ensure subpoenas and court papers are properly delivered. With our knowledge of San Diego neighborhoods and local jurisdictions, we keep cases moving forward without unnecessary delays.
Probate & Estate Investigations
Probate attorneys in San Diego often seek our assistance when they need to locate missing beneficiaries or confirm family relationships. Our investigators conduct comprehensive heir searches, utilize international databases, and create thorough due diligence reports. By delivering definitive proof that verifies family ties, we help executors and lawyers ensure assets are divided correctly, minimizing the risk of disputes during probate.
Personal Injury & Accident Investigations
After an accident occurs in San Diego, rapid evidence collection is vital. Our investigators respond quickly to canvas the scene, locate security footage from nearby businesses, and interview witnesses to reconstruct an accurate timeline of events. By gathering these crucial details promptly, we not only make personal injury claims stronger but also give victims a better opportunity to receive the compensation they are entitled to.

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Uncertainty can be stressful. Tristar is here to uncover the facts. Our experienced team offers discreet support and clear results, so you never have to wonder. Connect with us today and hire a private investigator in San Diego to get the answers you’re searching for.
Expanded Services for Every Need
Beyond these core practices, Tristar Investigation delivers a comprehensive suite of specialized services:
Surveillance & Monitoring
  • Spousal/Domestic Surveillance: We perform professional and discreet surveillance to address suspicions about a spouse or partner, documenting their activities to give you the clarity and evidence you need.
  • Cheating Spouse: If you are concerned about infidelity, we can obtain video and photographic proof, complete with detailed reports, to help you make confident decisions for legal or personal reasons.
  • Subrosa Surveillance: This undercover technique, often used in insurance and legal cases, uncovers hidden activities, dishonest conduct, or fraudulent claims without the subject’s awareness, ensuring you get the real story.
  • Injury Surveillance: We document the daily activities of individuals who have filed injury claims to see if their actions are consistent with their stated limitations, preventing fraudulent payouts.
  • Business Surveillance: Our specialized corporate surveillance helps companies monitor employee conduct, identify wrongdoing, and secure valuable assets, allowing you to reduce risk and protect your reputation.
Family & Custody Matters
  • Child Protection: We obtain evidence in situations involving potential neglect, abuse, or unsafe living conditions to ensure a child’s safety and well-being.
  • Runaway Teenagers: Our team responds with urgency and compassion to find missing teens, handling these sensitive cases with the utmost care.
  • Missing Persons: From finding a long-lost relative to locating someone who has recently vanished, we use the latest tools and reliable local contacts to deliver answers.
  • Divorce Investigations: In divorce matters, we uncover crucial evidence related to hidden finances, infidelity, or lifestyle habits to strengthen your legal standing.
  • Find Someone: We assist in reconnecting you with biological family, old friends, or other loved ones through meticulous searches and verification.
Fraud & Scam Investigations
  • General Fraud & Scams: We investigate everything from online schemes to personal deception, gathering the proof needed to protect clients from financial and emotional damage.
  • Workers’ Compensation Fraud: Our team looks into suspicious injury claims to help employers and insurers avoid paying out on fraudulent cases, using discreet surveillance to build a strong defense.
  • Bankruptcy & Foreclosure Fraud: We identify fraudulent financial documents, hidden assets, and false claims that can impact creditors and legal outcomes, ensuring fairness in complex financial cases.
Background Checks & Due Diligence
  • Background Checks: We provide comprehensive background reports on individuals and businesses, verifying criminal history, employment records, and more to help you make informed choices.
  • Check on Someone’s Past: For a potential business partner, tenant, or personal relationship, we deliver reliable history checks so you can proceed with safety and confidence.
  • Business Identity Research: Our investigators verify the legitimacy of companies, uncover their true ownership structures, and expose hidden connections to protect you from fraudulent entities.
Legal Support Services
  • Witness Outreach: We locate and contact potential witnesses for legal cases, securing their cooperation while maintaining strict confidentiality.
  • Witness Statements: Our team is skilled at taking accurate, court-ready statements that give attorneys the credible information they need to support their arguments.
  • Process Service: We ensure legal documents are delivered successfully, even in challenging cases where the recipient is actively avoiding service.
  • Subpoena Services: We help legal teams serve subpoenas effectively to obtain the testimony or documents crucial for their proceedings.
Asset & Financial Investigations
  • Asset Investigation: We locate undisclosed assets like property, vehicles, and bank accounts to support divorce cases, debt recovery, and other legal matters.
  • Asset Recovery: Our experts specialize in tracking down and recovering stolen or missing assets, helping restore rightful ownership.
Corporate & Employee Investigations
  • Employee Theft: We discreetly investigate and document workplace theft or fraud, helping businesses stop financial losses and improve internal security without disrupting operations.
  • Intellectual Property Protection: Our investigators protect your brand by identifying counterfeit goods, piracy, and other forms of IP misuse, ensuring your creations remain yours.
  • Corporate Intelligence: We provide businesses with valuable insights into competitors, market trends, and potential risks to support strategic decision-making.
  • Loss Prevention: We create and implement strategies to help companies reduce losses from theft and fraud, safeguarding profits and brand integrity.
  • Employment Law Investigations: We assist with internal investigations related to workplace disputes, discrimination, or policy violations, providing clear reports for confident action.
  • Employee List Research: Our team compiles and verifies employee data for companies and attorneys who need accurate workforce records for business or legal processes.
Specialty Investigations
  • Spanish-Speaking PI: Our firm offers investigations conducted by fluent Spanish-speaking professionals, ensuring clear communication for all clients.
  • Bilingual Claims Investigator: Our bilingual team is available to assist with insurance and accident claims, bridging language gaps to ensure fair and accurate outcomes.
  • Accident Investigations: We gather evidence at accident scenes, interview witnesses, and review official reports to uncover the facts.
  • Insurance Accident Investigations: We verify the details of accident claims to identify potential fraud, determine liability, and assist all involved parties.
Whether you need a large private investigation company with statewide resources or a discreet San Diego private investigator for a personal issue, Tristar Investigation offers the perfect blend of experience, flexibility, and proven success.
Why Choose Tristar Investigation?

With over 40 years of experience, our firm has established a track record for handling investigations with accuracy and skill. We understand the unique complexities of serving a diverse and widespread area like San Diego.

Major media outlets, including CNN and The Los Angeles Times, have recognized our company’s credibility. But what truly distinguishes us is our 97% case success rate, which ensures our clients get clear, actionable intelligence.
Confidentiality is the cornerstone of our practice. We know that investigations often involve private matters, so we utilize secure communication and discreet techniques to protect your privacy from start to finish.
Here is what we promise to deliver:

Our Commitment to You

We only take on a case when we are confident we can deliver the results you are looking for. Once we begin, our team works efficiently and with total professionalism, always making your satisfaction our main priority. When the investigation is complete, you will receive a simple, easy-to-read report with just the facts you need. We will also follow up to ensure you are fully satisfied with our work.
We understand that investigations often involve sensitive and personal topics, which is why every case is handled with the utmost discretion and respect. Call or email us today, and let us provide the information you need to make the right decision and achieve lasting peace of mind.

We Serve San Diego County, California

Here are a few of the cities in San Diego County, where we have helped clients get the information they need: