Trusted Lie Detector & Polygraph Exams in the San Gabriel Valley
At Spectrum Polygraph Services, we offer professional, confidential, and bilingual polygraph testing across the San Gabriel Valley. Whether you’re facing a sensitive relationship issue, legal investigation, or workplace concern, our lie detector tests provide accurate results you can rely on. We serve individuals, attorneys, and employers with discretion and professionalism—available in English and Spanish.

Legal Examinations
Utilize our expert polygraph services for legal cases, forensic investigations, and pre-trial assessments. Our detailed reports provide valuable insights for legal professionals.
Why Choose Spectrum Polygraph in the San Gabriel Valley?
- Years of professional law enforcement & polygraph experience
- APA-certified and trauma-informed examiners
- Bilingual services tailored to Spanish-speaking clients
- Flexible scheduling and mobile testing options
- Trusted by attorneys, private clients, and businesses
- Clear, same-day results in most cases
- 100% confidentiality and professional care