Professional Loss Prevention Services
Employee theft and organized fraud require more than guesswork; they demand clear, verifiable evidence. Our investigations uncover everything from single-employee crimes of opportunity to coordinated, multi-employee theft rings that threaten your operations. At Tristar, our licensed investigators provide discreet loss prevention services to uncover theft, expose conspiracies, and protect businesses from costly losses.
Whether it’s monitoring employees, documenting suspicious behavior, or compiling detailed reports, our loss prevention investigators deliver the actionable intelligence employers, attorneys, and insurers need. With decades of experience across California, we handle every case professionally, confidentially, and with the highest level of discretion.
Experienced Loss Prevention Experts
Decades of proven success investigating workplace theft, employee collusion, and internal fraud across multiple industries.
Clear Findings You Can Act On
Detailed surveillance, interviews, and reports that give employers, insurers, and legal teams the clarity to take decisive steps.
Statewide Confidence & Trust
Businesses and attorneys across California count on our loss prevention services to reduce losses and protect their operations.
Tailored Approaches to Loss Prevention
No two workplace theft cases are alike, which is why each loss prevention investigation requires a customized strategy. At Tristar, we start by reviewing the specific circumstances whether it’s missing inventory, suspected employee collusion, or organized fraud. From there, we design an approach that focuses on the most critical times, locations, and individuals to uncover the truth.
Our work may involve discreet observation of employees, undercover operations, polygraph testing, or interviews that expose inconsistencies. Every investigation is conducted with professionalism and confidentiality, ensuring the evidence we gather is reliable, court-ready, and useful for employers, attorneys, or insurers making high-stakes decisions.
Why Loss Prevention Matters
Employee theft and organized fraud create significant risks for businesses, insurers, and attorneys. Tristar’s loss prevention services provide discreet investigations that expose theft, recover losses, and prevent further misconduct. With years of proven success, our licensed investigators deliver accurate findings that protect your bottom line and support fair resolutions.
- Reports, video, and documentation that withstand legal and HR scrutiny
- Every loss prevention investigation is tailored to the specific business and type of loss
- Success in exposing employee theft, fraud, and collusion
- Undercover work, surveillance, polygraph testing, and interviews to confirm facts
- Discreet handling that protects your company’s reputation and employee privacy
- Relied on by attorneys, insurers, and businesses statewide to resolve internal theft cases
Our Approach to Loss Prevention
Internal theft and organized employee fraud require precision, discretion, and professionalism. At Tristar, we design each loss prevention investigation around the client’s unique challenges whether it’s inventory shrinkage, cash theft, or employee collusion. Using surveillance, undercover operations, interviews, and polygraph testing, we deliver reliable evidence that helps businesses, insurers, and attorneys stop theft and protect assets.
We follow strict legal and ethical standards, ensuring all investigations remain discreet and evidence is admissible in hearings or court.
Our team uses undercover work, surveillance, and employee interviews to document theft, identify collusion, and reveal inconsistencies in workplace activity.
Whether it’s a single theft incident, a suspicious pattern of losses, or a multi-employee scheme, each loss prevention investigation is tailored to your business needs for maximum effectiveness.
What people are saying
Tristar was very helpful in my address search. Kellie Anguiano was very personable and kept me up to date with the search process… Thank you so much for your help!
Emily
DDS Student | 2 years | Los Angeles, CA
Thank you for providing me with such outstanding service. I truly appreciate you and your staff for all you’ve done for me and my family…. I’m totally pleased with the outcome and their findings… Great job!
Gerome S.
Retired | USA
I have used Tristar for years. Their response time and results are unparalleled. They get my highest praise.
Robert Clayton
Attorney | Taylor & Ring, LLP | Los Angeles, CA
Tristar found my birth mothers records the same day. I am very impressed with their professionalism and the services they provide. I will use them again for any of my needs.
Dr. Claudia Barne
Professor | 23 years
Tristar is by far the most reliable and efficient investigator we have ever used.
Nicole Young
Attorney, 14 years | Woodland Hills, CA
Frequently Asked Questions
What are loss prevention services?
Loss prevention services are professional investigations that identify and stop employee theft, inventory shrinkage, and workplace fraud. They help businesses reduce losses, protect assets, and safeguard their reputation.
What does a loss prevention investigator do?
A loss prevention investigator uses surveillance, undercover operations, polygraph testing, and employee interviews to detect theft or collusion and provide clear, actionable evidence.
How is a loss prevention detective different from security staff?
While security staff deters theft in real time, a loss prevention detective conducts deeper investigations into suspected fraud, conspiracies, or ongoing internal theft that requires documented evidence.
Are loss prevention security services legal?
Yes. All loss prevention security services are conducted under California law and ethical standards, ensuring findings are reliable, discreet, and admissible when needed.
Who typically requests loss prevention investigations?
Businesses, insurers, and attorneys rely on our loss prevention company to uncover theft, protect finances, and provide verifiable findings for HR or legal actions.
Do you provide first-class security along with investigations?
Yes. Tristar is known for delivering first class security and loss prevention services across California. Our approach combines prevention, investigation, and protection, making us the trusted choice for businesses, attorneys, and insurers.
Can I hire a loss prevention security guard through Tristar?
Absolutely. In addition to investigative work, we provide loss prevention security guard support to deter theft on-site. Our guards act as a proactive layer of defense while our investigators handle complex theft and fraud cases.
Do your services include loss recovery?
Yes. Our investigations double as loss recovery services, helping companies not only detect fraud but also reclaim assets and reduce financial impact.
Do you offer loss prevention services in my area?
Yes. Tristar provides statewide coverage. If you’re searching for loss prevention services near you, our team is available in Los Angeles, San Diego, San Francisco, Sacramento, and throughout California.