“PT/35(b) was extremely, extremely dodgy. It was very, very suspicious. The way it suddenly appeared, embedded in a shirt collar, with the information on the page overwritten and changed, all police procedures were thrown out of the window.”

Rev. John Mosey

“Dr. Hayes seemed to have no real recollection independently of his notes of having found PT/35(b).  The sequence of the PT numbering and the absence from the notes of a drawing of the circuit board are unusual features.  The pagination of the notes was described by Hayes as “an unfathomable mystery” , for which he did propose an explanation, but unfortunately one that does not work. The memorandum of the 15th of September 1989 is difficult to understand if the fragment was indeed found on the 12th of May 1989. PT/35(b) is an important piece of evidence on which the Crown rely and in respect of which it is for the Crown to satisfy the court as to its provenance.  I submit that the irregularities and peculiarities which attend this item are some which the court ought to have some hesitation in being satisfied as to the item’s provenance.”

Lockerbie trial, page 9624.

PI 995 : The collar of a “SLALOM” shirt from which PT/35(b) was allegedly extracted

PT/35(b) is a small fragment of a timer circuit that was allegedly found among the debris of Pan Am 103 near the town of Lockerbie. After many years of studies, I have come to the conclusion that PT/35(b) is a forgery that was planted among the debris to implicate Libya in the bombing of Pan Am 103 and to steer the investigation away from the original suspects.

To mark the 30th Anniversary of the Pan Am 103 tragedy, INTEL TODAY will re-post one of our best Lockerbie stories every Wednesday until the end of the year. We would like to know what you think. Please, take this poll and encourage your friends to participate.

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RELATED POST: RELATED POST: Ambassador Andrew Ivy Killgore (1919-2016): Lockerbie Trial Was a Cover-Up

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PT/35(b) was the key piece of evidence of the Lockerbie Case. As Richard Marquise (FBI Agent who led the US side of the investigation) himself said:  “Without PT/35(b), there would have been no indictment.” ( See: FBI Richard Marquise: “No PT/35(b), No Case.”)

On May 12 1989, PT/35(b) was allegedly extracted from the collar of a “SLALOM” shirt labelled PI/995. (See Picture above)

The Lockerbie investigators concluded early in the investigation that this fragment was part of the mechanism that triggered a bomb aboard Pan Am 103. Here is the official story of PT/35(b) and how the investigators linked this fragment to Libya.



This fragment was eventually matched to a timer (MST-13) discovered among the weapons and material seized from rebels after an attempted coup in Togo on 23rd September 1986.


DP 124: The TOGO Timer (K1)


The identification was made in June 1990 by FBI Thomas Thurman, with some help from the CIA.

In February 1988, the CIA became aware of another MST-13 Timer that was found in luggage “belonging” to a Libyan citizen travelling to Dakar, Senegal.


The Senegal Timer – Top View

The Senegal Timer – Side View


That device was easily traced to a Swiss company because of a similarity to a device that had been found in Chad in September 1984.


The MST-13 had been manufactured by the Swiss company MEBO and supplied “solely” to Libya.

Main board of the MST13


The match between PT/35(b) and the main board of the MST-13 timer looks obviously excellent. Perfect indeed. But appearances can be deceptive. Indeed, I have come to the conclusion that PT/35(b) is a forgery.

Moreover, I believe that several witnesses were well aware that PT/35(b) could not have been part of the MST-13 timers delivered to Libya. I also believe that one of these witnesses deliberately withheld  this crucial information from the court.

Furthermore, the stories of the MST-13 Timers found in Togo and Senegal, as well as the identification of MEBO, are very dubious. At this point, one can reasonably infer that this so-called evidence was planted.

How did I come to believe that PT/35(b) is a forgery? Who could possibly have committed such a crime and for what possible motives? Where, when and by whom was this forgery fabricated? These are some of the questions that this series of posts intends to discuss.

A people always ends by resembling its shadow. – Rudyard Kipling


The Chronology of PT/35(b)  — A very detailed timeline of the many scientific investigations of PT/35(b)




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