Fresno

Trusted private detective in Fresno. Tristar Investigation offers licensed, discreet services for personal, legal & corporate cases.
All Service Areas
Need Help?
Tristar provides fast, discreet reports tailored to your needs. Call today to hire a private investigator near you and let our experienced team deliver the answers and clarity you deserve.

Our Services

Latest News

Need Help?
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.

Looking for a private detective in Fresno, CA, you can trust? For over 40 years, residents, businesses, and attorneys have turned to Tristar Investigation as a premier private investigation agency. Whether your needs are personal, legal, or corporate, you can count on our licensed investigators to deliver verified answers with complete confidentiality. From the heart of Downtown Fresno to the Tower District, we’ve helped countless clients uncover the truth, safeguard their interests, and regain peace of mind.

Private Investigation Services in Fresno
Choosing a firm in Fresno means finding a team with extensive experience and deep local insight. Tristar Investigations’ licensed professionals handle a broad range of cases for attorneys, private clients, and organizations. Below are key areas where our work makes a measurable difference:
Employment & Labor Law Support
Fresno’s diverse economy keeps employee rights in focus. We support employment attorneys with wage-and-hour disputes, discrimination claims, and unsafe workplace complaints. We:
  • Find and interview potential class members in wage and hour cases.
  • Collect records and witness statements to confirm unpaid wages or overtime violations.
  • Prepare clear, court-ready reports that provide attorneys with strong evidence.

Through these efforts, employees can obtain the justice they deserve, and legal teams gain the proof needed to move cases forward.
This work ensures that employees receive the justice they are owed and provides attorneys with a solid factual foundation to advance their cases successfully.

Asset & Financial Investigations
Before a lawsuit or settlement negotiation, it’s crucial to verify the other party’s ability to pay. Our team conducts asset searches across Fresno and Fresno County. We reveal:
  • Secret bank accounts, properties, and other real estate assets.
  • Hidden business connections and undisclosed investments.
  • Debts or financial obligations that may affect a judgment.
By uncovering these assets, we enable clients and attorneys to make informed decisions and safeguard their financial interests.
Surveillance & Injury Claim Verification
In a busy city like Fresno, exaggerated or false claims can arise. Our discreet surveillance operations verify personal injury and workers’ compensation claims. Using advanced techniques, we capture photo and video evidence to see if someone’s daily activities align with their reported injuries, saving insurance providers and defense attorneys time and money while promoting fairness.
Process Service & Legal Support
Serving legal documents in Fresno can be challenging when individuals attempt to evade service. We employ targeted strategies, stakeouts, background research, and well-timed approaches to deliver subpoenas and court papers successfully. Our familiarity with local neighborhoods and court procedures helps keep cases on track and on schedule.
Estate & Probate Investigations
Estate attorneys often need assistance locating heirs or verifying family relationships. We perform comprehensive heir searches, check international databases, and compile detailed due diligence reports. Clear documentation of family ties supports fair asset distribution and helps minimize probate disputes.
Accident & Personal Injury Investigations
After an accident, acting quickly is crucial. We canvass the area, secure security-camera footage, and interview witnesses to piece together accurate timelines. Gathering these details promptly strengthens personal injury claims and helps victims seek the compensation they deserve.

Need more details? Contact us

When you need clear answers, you deserve experts you can trust. Contact Tristar Investigation today for a free, confidential consultation, and let one of our Fresno private investigators help you uncover the truth.
Expanded Services for Every Need
Beyond these core areas, Tristar Investigation provides a full suite of specialized investigative services:
Surveillance & Monitoring
  • Spousal/Domestic Surveillance: Quiet monitoring to confirm concerns and deliver solid proof.
  • Cheating Partner: Photos, videos, and detailed reports to help with personal or legal decisions.
  • Subrosa Surveillance: Hidden methods used in legal or insurance cases to uncover false claims.
  • Injury Surveillance: Checking if reported injuries or limitations match actual daily activities.
  • Business Surveillance: Tailored observation to identify misconduct and protect company assets.
Family & Custody Matters
  • Child Protection: Collecting proof in cases of neglect, abuse, or unsafe environments.
  • Runaway Teenagers: A fast yet careful approach to help locate missing teens.
  • Missing Persons: Using advanced tools and trusted networks to track down the recently missing or long-lost individuals.
  • Divorce Investigations: Revealing hidden assets, infidelity, or behavioral patterns to strengthen your case.
  • Find Someone: Helping reconnect with biological family or old friends through verified searches.
Fraud & Scam Investigations
  • General Fraud and Scams: From internet scams to in-person swindles, we expose schemes and secure solid proof.
  • Workers’ Compensation Fraud: Investigations to help employers and insurance providers expose fraudulent claims.
  • Bankruptcy and Foreclosure Fraud: Uncovering hidden assets, false filings, and misleading statements in bankruptcy or foreclosure cases.
Background Checks & Due Diligence
  • Background Checks: Full screening to confirm education, work history, and criminal records.
  • Past Verification: Reliable reports on potential partners, tenants, or professional contacts.
  • Business Research: Authenticate a company’s legitimacy, ownership, and hidden links.
Legal Support Services
  • Witness Outreach: Locating and contacting witnesses while maintaining confidentiality.
  • Witness Statements: Obtaining accurate, court-ready statements from key witnesses.
  • Process Service: Professional delivery of legal documents even when subjects are evasive.
  • Subpoena Services: Efficiently serving subpoenas to secure critical testimony or records.
Asset & Financial Investigations
  • Asset Investigation: Find real estate, vehicles, and bank accounts for cases like divorces, debt recovery, or other legal matters.
  • Asset Recovery: Locate and assist in recovering stolen or missing property.
Corporate & Employee Investigations
  • Employee Theft: Discreet investigations to document internal theft or fraud.
  • Intellectual Property Protection: Detecting counterfeits, piracy, or misuse of intellectual property.
  • Corporate Intelligence: Market, competitor, and risk insights to inform business strategy.
  • Loss Prevention: Practical steps to minimize theft, fraud, and operational losses.
  • Employment Law Investigations: Clear reporting on workplace disputes, discrimination, or policy violations.
  • Employee List Research: Verified workforce information for business or legal needs.
Specialty Investigations
  • Spanish-Speaking PI: Fluent communication for clients who prefer Spanish.
  • Bilingual Claims Investigator: Bridging language gaps in accident and insurance investigations.
  • Accident Investigations: On-scene evidence gathering, witness interviews, and thorough record reviews.
  • Insurance Accident Investigations: Verifying claim details, uncovering fraud, and establishing liability.

Whether you need a private investigation firm with statewide reach or a discreet local investigator in Fresno, Tristar Investigation provides the ideal blend of experience, flexibility, and results.

Why Choose Tristar Investigation?

With over 40 years of investigative experience, our team resolves cases with meticulous precision and utmost professionalism. We recognize the unique challenges of investigating in a diverse city such as Fresno.

Our work has been highlighted by respected media outlets like CNN and the Los Angeles Times, underscoring the trust we’ve earned and the credibility we’ve built. Most importantly, with a 97% case success rate, we deliver clear, actionable results, the kind you can count on.
Confidentiality is at the core of everything we do, we use secure communication channels and discreet methods to protect your privacy at every step of the way. Here’s what to expect when you work with us:
Here’s what you can always expect from us:

Our Commitment to You

We only take on cases when we are confident we can deliver results. Once we agree to work together, our team moves quickly and professionally, always making your satisfaction the top priority. You’ll receive a clear, easy-to-read report with no confusing jargon, just facts, and we will follow up to ensure you are completely satisfied.
We understand that these matters are personal and sensitive. Every case is handled with the utmost discretion, respect, and care. Reach out by phone or email today to get the information you need to make the right decision and restore your peace of mind.