Polygraph & Interrogation Services

At MSS, we offer professional polygraph (lie detector) testing and structured interrogation services to help businesses, legal teams, and individuals obtain truthful, verifiable information in sensitive or high-stakes situations.

Our services are conducted by trained, certified, and discreet professionals, ensuring accuracy, confidentiality, and compliance with South African legal and ethical standards.

Our MSS polygraph test process, also known as a lie detector test, measures a person’s physiological responses (such as heart rate, breathing, and skin conductivity) while they answer a set of structured questions. These responses can indicate whether someone is being truthful or deceptive. 

When done right, by our experienced, highly trained, and ethical examiners, polygraph testing can be an incredibly powerful tool to restore trust, resolve conflict, and uncover the truth.

Polygraph & Interrogation Services

At MSS, we offer professional polygraph (lie detector) testing and structured interrogation services to help businesses, legal teams, and individuals obtain truthful, verifiable information in sensitive or high-stakes situations.

Our services are conducted by trained, certified, and discreet professionals, ensuring accuracy, confidentiality, and compliance with South African legal and ethical standards.

Our MSS polygraph test process, also known as a lie detector test, measures a person’s physiological responses (such as heart rate, breathing, and skin conductivity) while they answer a set of structured questions. These responses can indicate whether someone is being truthful or deceptive. 

When done right, by our experienced, highly trained, and ethical examiners, polygraph testing can be an incredibly powerful tool to restore trust, resolve conflict, and uncover the truth.

Our Polygraph Services Include:

  • Pre-employment screening – to verify the honesty and integrity of potential hires

  • Periodic integrity testing – for ongoing employee trust verification

  • Incident-related testing – for theft, fraud, sabotage, or workplace misconduct

  • Verification of statements – in internal investigations or disputes

  • Relationship and personal matters – discreet private polygraph testing

How it works:

  • A polygraph measures physiological responses (heart rate, blood pressure, breathing patterns, skin conductivity) while a person answers a series of structured questions.

  • Results help determine whether the subject is truthful or deceptive.

Our Interrogation Services Include:

  • Internal workplace investigations – uncovering misconduct, fraud, or collusion

  • Incident follow-ups – identifying the source of a security breach or theft

  • Suspect and witness interviews – gathering critical information for legal or operational purposes

  • Collaboration with law enforcement – to strengthen evidence and case outcomes

Our interrogation approach:

  • Non-coercive and lawful questioning methods

  • Use of interview psychology and evidence-based techniques

  • Detailed interview and findings reports for HR, legal, or disciplinary use

FAQs on our Polygraph & Interrogation Services

Yes. Polygraph tests are legal in South Africa, provided the person taking the test gives consent. However, results are not automatically admissible in court—they are mainly used as a supporting investigative tool in workplace, private, and legal matters.

Not on the polygraph results alone. Employers may use polygraph results as part of a broader investigation along with other evidence to make disciplinary or HR decisions.

  • Pre-employment screening to verify honesty

  • Theft, fraud, or misconduct investigations

  • Workplace disputes

  • Personal or relationship disputes where truth is important

  • Verification of statements in sensitive matters

When conducted by a trained, certified examiner, polygraph tests can be up to 90–95% accurate. Accuracy depends on examiner skill, proper preparation, and cooperation of the person being tested.

  • Polygraph Test: Uses equipment to measure physical responses to questions.

  • Interrogation: A structured questioning process to obtain information, relying on psychology, interview strategy, and evidence presentation.

Yes. We conduct interrogations for:

  • Companies during internal investigations

  • Legal teams preparing cases

  • Private clients seeking discreet fact-finding

  • Security-related incident follow-ups

Absolutely. All polygraph and interrogation sessions are strictly confidential, and results are shared only with authorized persons.

Need Polygraph & Interrogation Services ?

Our Polygraph Services Include:

  • Pre-employment screening – to verify the honesty and integrity of potential hires

  • Periodic integrity testing – for ongoing employee trust verification

  • Incident-related testing – for theft, fraud, sabotage, or workplace misconduct

  • Verification of statements – in internal investigations or disputes

  • Relationship and personal matters – discreet private polygraph testing

How it works:

  • A polygraph measures physiological responses (heart rate, blood pressure, breathing patterns, skin conductivity) while a person answers a series of structured questions.

  • Results help determine whether the subject is truthful or deceptive.

Our Interrogation Services Include:

  • Internal workplace investigations – uncovering misconduct, fraud, or collusion

  • Incident follow-ups – identifying the source of a security breach or theft

  • Suspect and witness interviews – gathering critical information for legal or operational purposes

  • Collaboration with law enforcement – to strengthen evidence and case outcomes

Our interrogation approach:

  • Non-coercive and lawful questioning methods

  • Use of interview psychology and evidence-based techniques

  • Detailed interview and findings reports for HR, legal, or disciplinary use

FAQs on our Polygraph & Interrogation Services

Yes. Polygraph tests are legal in South Africa, provided the person taking the test gives consent. However, results are not automatically admissible in court—they are mainly used as a supporting investigative tool in workplace, private, and legal matters.

Not on the polygraph results alone. Employers may use polygraph results as part of a broader investigation along with other evidence to make disciplinary or HR decisions.

  • Pre-employment screening to verify honesty

  • Theft, fraud, or misconduct investigations

  • Workplace disputes

  • Personal or relationship disputes where truth is important

  • Verification of statements in sensitive matters

When conducted by a trained, certified examiner, polygraph tests can be up to 90–95% accurate. Accuracy depends on examiner skill, proper preparation, and cooperation of the person being tested.

  • Polygraph Test: Uses equipment to measure physical responses to questions.

  • Interrogation: A structured questioning process to obtain information, relying on psychology, interview strategy, and evidence presentation.

Yes. We conduct interrogations for:

  • Companies during internal investigations

  • Legal teams preparing cases

  • Private clients seeking discreet fact-finding

  • Security-related incident follow-ups

Absolutely. All polygraph and interrogation sessions are strictly confidential, and results are shared only with authorized persons.

Need Polygraph & Interrogation Services ?