Case Study 15: A Couple’s Journey with a Lie Detector Test

Mike Rumble

Sep 30, 2025

Last Update: Jun 28, 2026

Background

Anthony and Mark were talking about getting married, and during that conversation, they agreed that they wanted a “clean start” so that no past jealousies or current suspicions would fester and later destroy their love and trust for each other.

The couple contacted our company and, having explained their position, they wanted some form of assurance that a polygraph test would resolve the matter once and for all. In essence, their concerns were infidelity-related, so the polygraph procedure was explained in detail, and several questions later, Mark’s only reservation was that his past love life would have an influence on his reactions.

Relationship History

Anthony had been openly gay all of his adult life, whereas Mark had hidden his sexual preferences and had married and fathered two children. Anthony was clear that all of his partners were known to Mark, who had been given a detailed history of Anthony’s relationships. Mark, however, had never had a public relationship other than with Anthony, and most of his partners had been casual acquaintances.

The Test

The test was booked, and both men attended the pre-test interview. Mark had been so worried that he would forget a particular encounter with a casual partner that he had drawn up a list of liaisons covering 12 A4 pages. We conducted the pre-test procedure and calmed Mark’s anxieties.

He requested to “get it over” first and was subsequently tested and passed with no deception indicated. Anthony simply flew through the test, clearly being honest in all of his answers.

Outcome

When we gave them the test results, Anthony remarked, “I knew he would pass. He spent hours writing and rewriting his list so he would be sure that he had left nothing out.” The couple is to marry in December, and they are both wearing White!

Mike Rumble
Mike Rumble

Mike Rumble is a former detective with years of experience in the investigation and lie detection field. He has been the advocate for polygraph tests for more than 4 decades. He is the founder and chief examiner of Lie Detectors UK Services, the most prestigious Lie Detection company in the UK.