About Tristar Investigation
A Trusted Private Detective Agency in California for Over 40 Years
At Tristar Investigation, we’ve built our reputation as one of the most respected private investigation companies in California. For more than four decades, we have provided individuals, attorneys, insurers, and businesses with discreet, professional, and results-driven investigative services. Our team of licensed private investigators in California combines experience, technology, and legal precision to uncover the truth.
Most Trusted Services in California
Trusted Statewide
We provide specialized investigative and legal support for attorneys, businesses, insurers, and individuals. Our top services focus on the areas where we deliver the greatest impact, uncovering fraud, locating witnesses, protecting assets, and keeping legal cases on track. With decades of proven results, these six services are the foundation of why clients across California trust us.
Complete investigative support for employment law cases. For Class Action and PAGA wage and hour claims, we deliver accurate employee data, outreach, and plaintiff location services so you can proceed with confidence.
Trusted by attorneys statewide, we provide difficult service of process through investigative methods, strategic fieldwork, and clear documentation for cases where routine delivery is not enough.
Strengthen your case with verified financial intelligence. Our asset searches uncover real property, concealed holdings, and financial relationships, giving attorneys clear documentation for litigation and recovery.
Discreet support for complex probate and estate matters. As licensed investigators we verify assets, locate beneficiaries, clarify financial questions, and provide documented findings that keep filings moving forward.
Uncover the truth with discretion and care. We provide confidential surveillance and clear documentation to confirm or clear suspicions of infidelity, handling every sensitive matter with absolute discretion.
Discreet subrosa surveillance that documents claimant activity and exposes inconsistencies tied to suspected injury fraud, giving claims professionals reliable, real-world insight on questionable claims.
Services Offered
Comprehensive Investigations Tailored to Your Needs
We offer a wide range of professional investigative services, tailored to meet the unique needs of individuals, families, businesses, attorneys, and insurers.
Uncover hidden assets and verify financial holdings during divorce, child support actions, loan disputes, fraud cases, or inheritance matters, with specialists who bring clarity to personal financial concerns.
Discreet background checks for personal peace of mind. Whether you are meeting someone new or wary of a romance scam, we verify the past and deliver clear, reliable information that protects your safety.
We uncover deceptive activity, verify suspicious claims, and document what actually happened, from online transactions to false identities, helping you protect your finances, reputation, and peace of mind.
When a teenager runs away, we focus on locating them quickly and responsibly, using lawful methods to identify leads and confirm whereabouts while keeping their safety first during an urgent, uncertain time.
Professional missing persons investigations handled with accuracy and discretion. Our licensed investigators locate hard-to-find individuals and verify whereabouts so you can make informed decisions with confidence.
Uncover the truth with discretion. Our licensed investigators clarify concerns, document relevant facts, and reduce uncertainty during divorce so you can make informed decisions with greater peace of mind.
When concerns arise about a child's safety, we document observable behavior and activities that may affect custody or parenting decisions, bringing factual clarity to situations where objective information matters most.
Time-sensitive legal documents delivered accurately and lawfully. Our subpoena services handle each matter with care, attention to procedural requirements, and respect for the seriousness of what is at stake.
We locate individuals with outdated or intentionally obscured contact information, identifying current addresses, employment, and records that support claims resolution, subrogation, and recovery efforts.
Claimant and witness background investigations that verify histories, spot inconsistencies, and flag fraud indicators, from identity confirmation to reviews of prior claims, litigation, assets, and online activity.
Discreet, lawful observation that documents claimant activity, verifying reported injuries, limitations, and work restrictions with objective evidence that supports accurate claim evaluation and compliance.
Accident claims depend on verifiable facts. We examine how incidents occurred, verify reported details, and document evidence that supports accurate liability and coverage decisions on disputed claims.
Our bilingual claims investigators bridge language gaps with accurate interviews, reliable statements, and clear documentation, so language barriers never compromise understanding or informed claim decisions.
We determine whether an alleged injury truly arose out of and occurred in the course of employment, examining work activities, timelines, and facts so insurers and employers can decide claims early and accurately.
Discreet, lawful surveillance for concerns involving fraud, losses, and workplace conduct. We deliver objective documentation that supports risk management, internal reviews, compliance, and informed business decisions.
Verify candidates before you hire. Our business background checks confirm identity and work history and flag risks, from criminal records to online activity, giving employers clear information for confident decisions.
We document claimant activity to identify exaggerated or fraudulent injury claims, using lawful surveillance, scene documentation, and detailed statements to support accurate claim decisions and risk management.
We help businesses identify theft, policy violations, and internal risks. From isolated concerns to ongoing losses, our investigators deliver documented findings that support accountability and protect your assets.
We protect intellectual property with discreet, defensible investigations, identifying infringement, documenting misuse, and preserving evidence that supports claim evaluation and effective litigation strategy.
Employee theft investigations confirm or rule out misconduct discreetly and lawfully, documenting clear, objective findings that support sound decisions while reducing risk, loss, and tension inside your business.
Accurate, actionable intelligence on companies, executives, and operations. We uncover risks and misconduct through discreet methods, supporting due diligence, planning, and risk management with full confidentiality.
We trace assets that are concealed, improperly transferred, or overlooked in financial disputes, showing where value truly exists so decision makers can protect interests, assess risk, and recover with confidence.
Discreet, targeted monitoring that helps defense attorneys evaluate injury claims. We gather clear evidence of inconsistencies, exaggerated limitations, or behavior that points to fraud, documented for use in court.
Clear, factual insight into defendants and other parties in a case. We verify identities, review history, and surface details that affect credibility and risk, with discreet research and organized reporting for attorneys.
Court-aware documentation of conduct, lifestyle, and behavior patterns for family law matters. Our licensed investigators work lawfully and objectively, producing clear reporting for strategy, settlement, or evidence.
Discreet, results-driven missing persons work for litigation, asset recovery, and case development. We locate hard-to-find individuals and verify whereabouts for service of process, witness location, and heir searches.
We uncover objective information on assets, conduct, and credibility in contested family law matters, documenting relevant facts so attorneys can evaluate strategy, assess risk, and make informed legal decisions.
We investigate suspected misrepresentations, concealed assets, and improper filings in bankruptcy and foreclosure matters, helping attorneys evaluate risk, clarify facts, and determine whether fraud affects the case.
When a plaintiff stops responding, cases stall. We locate missing plaintiffs, witnesses, and other parties who have moved or disengaged, delivering documented findings so your legal matter can proceed with clarity.
Building on Employee List Research, our bilingual team contacts defendant employees for your Class Action or PAGA case, confirms eligibility, conducts preliminary interviews, and reports progress in organized updates.
We build defendant employee lists for Class Action and PAGA cases, organizing names and contact details into clear spreadsheets your team can use for internal review and the Witness Outreach phase that follows.
Investigations for legal matters involving companies and partnerships. We verify records, identify concealed relationships or misconduct, and show how a business truly operates, giving attorneys defensible insight.
Professionally obtained witness statements that support case evaluation and litigation strategy. We conduct neutral interviews and prepare clear, factual documentation built to withstand accuracy and legal scrutiny.
Attorneys trust Tristar to establish facts and clarify liability after accidents. We document scenes, canvass for collision video, locate witnesses, and deliver court-ready findings for filings, negotiation, and trial.
Tristar In The News
Stay updated with the latest from Tristar Investigation. Our news and insights highlight real cases, industry trends, and investigative breakthroughs. From high-profile media coverage to practical tips for attorneys and businesses, we share updates that matter.
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Service Areas
We serve all of California and the USA
Our licensed investigators provide trusted support across California, delivering professional results for individuals, businesses, attorneys, and insurers statewide.
Newport Beach
Irvine
Santa Ana
Chula Vista
Beverly Hills
Glendale
Riverside County
San Bernardino
Santa Clara County
Bakersfield
Anaheim
San Francisco
Sacramento
Alameda County
Fresno
Long Beach
Oakland
San Jose
San Diego
Los Angeles
Tristar Blogs
Stay informed with expert insights from Tristar Investigation. Our blogs cover real investigative strategies, case studies, and legal perspectives to help clients, attorneys, and businesses make better decisions.
What Our Clients Say About Us
For over four decades, clients across California have trusted Tristar Investigation for discreet, professional, and results-driven services. From individuals and families to attorneys, insurers, and corporations, our private investigators in California are praised for their confidentiality, accuracy, and dedication to uncovering the truth.
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Your case will be handled discreetly by licensed California investigators.