Polygraph Testing

Dolos Investigations Private Investigators

Polygraph testing in Sheffield or it’s more commonly known phrase of ‘taking a lie detector test,’ is now part of our services at Dolos Investigations’ Private Investigators. Our investigator is an expert in this field, carrying out several polygraph tests a week. They have invested in the latest equipment, which together with their expertise, aims to achieve a 90 to 99% accuracy rate.

Our Private Investigator will be able to read the results of the polygraph machine, which detects subtle changes in heart rate, breathing and with the facial mapping equipment – pupil dilation. This all leads to a highly accurate result. The industry standard to determine accurate results is 3 curated questions. However, we have chosen to use 6 curated questions to increase the likelihood of whether the subject is telling the truth or a lie.

Our expert has an office in Derby, but if you can’t attend our office we can travel to you. Call us now to discuss our service and fees

Is polygraph testing legal?

To carry out a polygraph test we need explicit consent from the subject involved. We cannot force anybody to do one, nor can should they be coerced into taking the test.

Polygraph testing is legal, but as it stands currently, the results are not normally used in the Courts of Law within the UK. IE the criminal courts – Magistrates and Crown Courts.

The results from a polygraph test can be used in Tribunal Hearings or Civil Court, but would be used as supporting evidence (corroboration) as opposed to the main evidence. Speak to our expert for further clarity with our free no

Dolos Investigations will out the truth for you

Our polygraph testers can interpret the results to achieve a 90 – 99% accuracy rate.

What can I use polygraph testing for?

The most common reasons why people come to Dolos Investigations Private Investigators to find out if polygraph testing is the right answer for them are:

Matrimonal/Cheating Partner

Does your partner have a history of cheating, or all the signs are there that they are currently cheating? Even when you have challenged them directly, you are still not convinced that they are telling the truth. Polygraph can be an alternative to surveillance (which we also specialise in).


Disputes between family, friends, neighbours or even work colleagues. Where there is no tangible evidence to say who was right or wrong, polygraph testing can be the way to once and for all settle the matter, and help people move forward.

Employment Matters

There are myriad reasons why we have been used within the commercial sector. Theft, staff taking ‘sick days’ or meeting competitors. What about that outstanding CV that seems too good to be true? Or even screening potential employers beforehand? The list goes on.



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