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Business Details
30 Years
experience
Professional Investigative Services in Newhall, CA
Tri-Valley Investigations is a full-service licensed investigative agency based in Southern California with decades of combined experience in conducting thorough and confidential investigations. Our team of highly trained professionals specializes in pre-employment background checks, locating missing persons, asset identification, surveillance, and corporate investigations, serving attorneys, individuals, insurance companies, and corporations. Founded by Cookie Schwartz, a licensed private investigator and Certified Fraud Specialist, we leverage access to billions of nationwide records and a network of trusted sources to deliver accurate, timely, and legally compliant results. Our commitment to discretion, professionalism, and cost-effective solutions has earned us a reputation for excellence in both local and international cases. We provide comprehensive written reports and prioritize client confidentiality, ensuring tailored investigative strategies that meet the unique needs of each case.

With expertise in civil, criminal, and employment-related investigations, we combine advanced research tools with hands-on fieldwork to uncover critical information. Our clients consistently attest to our dedication, reliability, and ability to resolve complex investigative challenges. Headquartered in northern Los Angeles County, we maintain a steadfast focus on ethical practices and legal compliance while delivering actionable intelligence to support legal, business, and personal decisions. Our services extend to pre-trial investigations, computer forensics, threat assessments, and specialized surveillance operations. For over 25 years, Tri-Valley Investigations has remained a trusted partner for clients seeking expert investigative support.
Services
Background Checks Missing Persons Surveillance Corporate Investigations Asset Identification Computer Forensics Process Service Threat Assessment Pre-Trial Investigations Polygraph Testing
Details
  • Year established: 1996
Highlights and features
  • Experienced investigators with decades of combined expertise in legal and corporate investigations
  • Access to billions of nationwide records and trusted international investigative sources
  • Certified Fraud Specialist on staff for specialized financial and legal investigations
  • Comprehensive, court-ready reports developed through rigorous research and fieldwork
  • Proven track record serving attorneys, insurance companies, and private clients since 1996
Associations and certifications
  • Certified Fraud Specialist
Services
Background Checks
We conduct comprehensive pre-employment background checks including criminal records, employment verification, and professional license validation. Our investigations help businesses and individuals make informed decisions about potential employees or partners. We utilize official databases and field interviews to ensure accurate, legally compliant results.
Missing Persons
Our team specializes in locating missing individuals through public records, electronic databases, and field surveillance. We assist families, legal professionals, and businesses in finding lost loved ones, debtors, or witnesses. Our methods combine advanced research tools with traditional investigative techniques for reliable outcomes.
Corporate Investigations
We provide due diligence investigations for corporations including fraud detection, asset identification, and trade history verification. Our services help businesses mitigate risks during mergers, acquisitions, or partnership evaluations. We deliver detailed reports based on verified financial and operational data.
Surveillance
Our licensed investigators conduct discreet surveillance operations for personal injury claims, infidelity cases, and corporate investigations. We use advanced equipment and strategic positioning to document activities while maintaining legal compliance and client confidentiality throughout the process.
Computer Forensics
We recover and analyze digital evidence from computers, phones, and storage devices for legal proceedings. Our specialists preserve electronic data while maintaining chain-of-custody protocols. This service supports cases involving cybercrime, intellectual property theft, and digital fraud investigations.
People
Cookie Schwartz
Owner, CEO
Licensed private investigator (No. PI 18825) and Certified Fraud Specialist with over 25 years of experience in legal and corporate investigations. Former legal assistant with expertise in civil, criminal, and employment-related cases.
Frank H. Diaz
Surveillance Specialist
Experienced investigator specializing in surveillance operations and Spanish translation services. Trained in field monitoring techniques and evidence documentation for legal proceedings and private clients.
Questions
What types of investigative services do you offer?
We provide background checks, missing persons investigations, surveillance, corporate investigations, computer forensics, and asset identification services for legal, business, and personal needs.
Are your investigators licensed and certified?
Yes, our founder is a licensed private investigator (No. PI 18825) and Certified Fraud Specialist with decades of experience in legal and corporate investigations.
Do you handle cases outside California?
We conduct investigations nationwide and internationally through our network of trusted sources and access to billions of records across jurisdictions.
What makes your agency different from others?
Our combination of certified expertise, access to extensive databases, and commitment to legally compliant, client-confidential investigations sets us apart in the industry.