Professional Polygraph testing & Voice Stress Analysis Services
King Private Investigators excels in providing advanced polygraph testing and voice stress analysis services, ensuring precise truth verification in diverse situations. Our certified team employs the latest methodologies to help resolve personal disputes and support corporate decision-making. With our commitment to confidentiality and accuracy, trust King Private Investigators to deliver professional and reliable results, empowering you to make well-informed choices.
Our expert examiners utilize state-of-the-art polygraph technology to assess the credibility of individuals in various contexts, including criminal investigations, employment screenings, and personal matters. With a commitment to confidentiality and accuracy, we provide comprehensive reports and interpretations of polygraph results, empowering our clients to make informed decisions. Whether for corporate or personal use, King Investigators’ lie detection services are tailored to meet the highest standards of integrity and professionalism.
Polygraph Testing
King Private Investigators provides professional polygraph testing services, offering a reliable and scientific method for truth verification across various scenarios. Our certified polygraph examiners utilize advanced equipment to measure physiological responses, enabling an accurate assessment of an individual's truthfulness.
Whether it's for resolving personal disputes, conducting employee screenings, or supporting criminal investigations, our polygraph tests are conducted with the utmost professionalism, ensuring confidentiality and impartiality. Each session is tailored to the specific needs of our clients, and results are delivered with detailed analysis to support informed decision-making. Trust King Private Investigators for precise, confidential, and expert polygraph testing services.
Voice Stress Analysis
King Private Investigators offers expert Voice Stress Analysis (VSA) lie detection testing, providing a sophisticated and non-invasive method for evaluating truthfulness. This advanced technique analyzes vocal patterns and microtremors in speech, detecting stress levels that may indicate deception. Our experienced examiners conduct VSA tests in a controlled environment, ensuring accuracy and confidentiality.
Ideal for various applications, including employee screenings, fraud investigations, and personal matters, our Voice Stress Analysis services are designed to deliver precise and reliable results. With King Private Investigators, you receive professional and discreet VSA testing that empowers you with the insights needed to make informed decisions.
​Polygraph Testing Services in South Africa
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Fast. Accurate. Confidential.
Do you need to uncover the truth in a situation where trust has been broken? Polygraph testing, also known as lie detector testing, is a highly effective tool used in personal, legal, and workplace investigations. At King Investigators, we offer professional, PSIRA-compliant polygraph services across South Africa—trusted by businesses, attorneys, and private clients alike.
When to Use a Polygraph Test
A polygraph test can quickly clear suspicion or confirm deceit. Common use cases include:
Employee theft or misconduct
Infidelity suspicions
Screening domestic workers or nannies
Workplace fraud or HR investigations
Business partnership disputes
False accusations or internal conflicts
Whether you need to validate innocence or uncover deception, a lie detector test offers clarity and peace of mind.
How It Works
Our polygraph tests are conducted by trained and accredited professionals using modern, industry-standard equipment. The process involves:
1. Pre-test interview – to understand the situation and agree on relevant questions.
2. Testing – sensors monitor physiological responses like heart rate, breathing, and sweat gland activity.
3. Post-test analysis – a detailed report of the findings is provided.
All results are handled confidentially, with optional written reports for employers or legal representatives.
Why Choose King Investigators?
Certified and experienced polygraph examiners
Portable testing – we can come to your location
Flexible scheduling, including urgent cases
Trusted by attorneys, corporates, and individuals
Transparent pricing and support throughout the process
Our goal is not just to test—but to help you understand and act on the results.
We Serve All Major Areas in South Africa
We provide on-site or off-site polygraph testing in:
Johannesburg, Pretoria, Sandton, Midrand
Cape Town, Durban, Port Elizabeth
Eastern Cape: Jeffreys Bay, St Francis Bay
Limpopo, Mpumalanga, and surrounding regions
Mobile testing units are available nationwide.
Book Your Test Confidentially
Whether it’s a workplace matter or a personal issue, the truth is within reach.
Call or WhatsApp King Investigators today for a free quote and confidential consultation.
King Investigators – Truth Verified. Trust Restored.
PSIRA Registered – Reg No: 2937676
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