“Not my top priority” – Ian Bailey offered lie detection test for murder of Sophie Toscan du Plantier


The owner of Ireland’s oldest lie detection service has said she is ready to perform a polygraph analysis on Ian Bailey.

r Bailey recently spoke of his desire to undergo a polygraph test on camera to prove that he did not kill Sophie Toscan du Plantier.

InFocus podcast: Murder of Sophie Toscan du Plantier: the unanswered questions

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Despite being the main confessed suspect in the unsolved murder of Ms Toscan du Plantier in West Cork in December 1996, Mr Bailey has always maintained his innocence and has never been charged with the murder here in Ireland.

Last month, the 64-year-old claimed he had informed director Jim Sheridan that he was prepared to be filmed taking a lie detection test “to prove to the world that I am innocent” , as part of the documentary recently released by the Dublin filmmaker. on the murder mystery.

But the test did not take place, as Sheridan chose not to accept his offer to use a polygraph for inclusion in the hit Sky Murder at the Cottage: The Search For Justice For Sophie documentary.

However, Sian Devine, who runs Dublin-based Lie Detector Ltd, said she would be ready to conduct a specially designed polygraph survey on Bailey.

She said: “Ian Bailey’s circumstances are characteristic of why many people choose to take polygraph tests – they just feel like they have no other way to prove that they are true.

“The polygraph is often referred to as a ‘lie detector’, and it is a term most people recognize. However, it does not detect lies and it would be more accurate to describe it as a truth checker.

“When the person being tested is not truthful, an involuntary physiological response, associated with deception, occurs. If this response occurs when the candidate answers the questions about why the test is being taken, they will fail the test. But if this response does not happen, they will take the test.

Ms Devine said, however, that a polygraph test has its limitations.

“A polygraph test is not foolproof, but it is quite conclusive and in this case we would perform what is called a single problem polygraph test, which would have a narrow focus, with questions all relating to a single problem.” , she said.

“The questions would not be emotional or designed to over-stimulate the candidate. The use of a word like ‘kill’, for example, could be emotional and should be avoided.

“The more you widen the problem and the more questions you ask, the less accurate the test becomes. But that way the results would be accurate up to 97pc.”

As her polygraph is portable, Ms Devine said she would be prepared to go to a location agreed upon by herself and Mr Bailey, who is of English descent. She also said the polygraph probe would take up to two and a half hours in total and consist of a pre-test interview, the test itself, and then a post-test interview.

She added: “Ian Bailey is in a position where the DPP has repeatedly concluded that there is not enough evidence to charge him. However, for many people, that did not exonerate him, while many others think he is innocent, and some just don’t know what to believe. Ian Bailey may think he has nothing to lose and potentially a lot to gain by taking a polygraph test. “

When asked if he would be ready to undergo a polygraph probe with Lie Detector Ltd, Manchester-born Mr Bailey said: “It’s really not my top priority at the moment. ‘other things to take care of. I don’t’ I don’t want to make any other comments at this time. “

Mr Bailey was arrested twice by Gardaí in the months following the death of French filmmaker Sophie Toscan du Plantier, but has never been charged.

Despite this, French authorities launched their own lawsuits against Mr Bailey in 2019 and sentenced him by default for the murder.

A Paris court sentenced him to 25 years in prison.


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