A commentary on the case of Abdelbaset al-Megrahi, convicted of the murder of 270 people in the Pan Am 103 disaster.
Tuesday, 15 November 2016
Thurman and the circuit board fragment
Tuesday, 16 April 2013
FBI Lockerbie explosives expert comments on Boston bombing
Tom Thurman, a former FBI explosives specialist who was involved in the investigations of the bombing of the Pan Am flight over Lockerbie and the 1993 World Trade Center bombing, said the fact that the bombs produced white smoke indicated they were probably an improvised device. While military explosives such as C4 cause big plumes of black smoke, he said, white smoke was usually the result of a device that contained gunpowder or a commercial rock-blasting explosive such as dynamite.
Mr Thurman, now at eastern Kentucky University, said an improvised device would need to be packed into some form of container such as a pipe, which could explain the reports of extensive shrapnel wounds among some of the victims.
While the FBI, which is leading the investigation, said it was pursuing a number of leads, former security officers warned that such cases can sometimes take a long time to resolve.
[It was Tom Thurman who purportedly identified the crucial Lockerbie circuit board fragment as coming from a MEBO MST-13 timer. Posts on this blog in which he is mentioned can be accessed here.]
Friday, 19 April 2013
Thurman: forensics ensuring that right people, not wrong people, are charged
FBI bomb technicians poring over hundreds of scraps of metal, nails, wires, and other debris — some surgically removed from bomb victims’ flesh — were closing in Thursday on the design of the explosive devices used in the Boston Marathon attacks, according to officials and forensics experts.
In an effort to trace the source of the components, the Explosives Unit at the agency’s state-of-the-art crime laboratory in Quantico, Va, outside of Washington, was comparing the materials collected from sidewalks, rooftops, gutters, overhangs, and even the soles of victims’ shoes against lab reports generated from thousands of previous blasts around the world, looking for a “bomber signature.” (...)
The methodical work at Quantico is seen as critical in helping investigators identify the perpetrators and secure a conviction in the worst terrorist attack on US soil since Sept 11, 2001.
“Most bombing investigations like this are forensically driven,” said former supervisory special agent James T Thurman, who served as chief of the Explosives Unit in the FBI Laboratory’s Bomb Data Center. “Whatever is found that ultimately goes to the laboratory is what drives the investigation and connects a possible subject with the components.” (...)
[T]hose familiar with the inquiry and the FBI’s lab said the Explosives Unit is relying on specialized tools to conduct what amounts to an autopsy on the pair of so-called IEDs — improvised explosive devices — that were apparently detonated by battery-powered timers near the Copley Square finish line.
One is a database known as the Explosive Reference Tool, a searchable computer archive containing investigation reports from bombings dating back decades, along with so-called underground bomb-making handbooks and manufacturing data for key bomb-making components and explosives. (...)
Potential evidence that was identified, bagged, and tagged — including by agents who spread out to hospitals to secure bomb material and residue removed from wounds — began arriving in the Quantico lab even before the bombing sites were fully swept for evidence.
“It is a two-way street,” said Thurman, who investigated the bombings of the US Marine Corps barracks in Lebanon in 1983, Pan Am Flight 103 in 1988, and World Trade Center in 1993. He explained that as the lab uncovers clues and materials it may send orders back to the bombing scene to look for specific things.
“They will continue that as long as it takes,” he added. “It can take less than a day. It can take a week. It can take two weeks.”
Thurman, who teaches at Eastern Kentucky University, also cautioned that it could take longer, citing the bombing of a judge in Alabama in 1988, when the forensics analysis took two years.
“This is not an overnight thing,” he said. “The issue at the end of the day is to find the guilty party who is responsible for constructing and setting off these devices,” he said. “You are ensuring that the right people and not the wrong people are being charged.”
[Tom Thurman’s part in identifying the dodgy timer circuit board fragment in the Lockerbie investigation is dealt with here and here.]
Wednesday, 21 March 2012
What the SCCRC should have asked the FBI
[The commentary on this issue in Scottish lawyers' magazine The Firm can be read here.]
Tuesday, 21 March 2017
Lockerbie questions for the FBI
What the SCCRC should have asked the FBI
Saturday, 31 May 2025
Masud trial: both sides experiencing difficulties in preparing
[What follows is excerpted from an item posted today on the Intel Today website:]
The trial of Abu Agila Masud, the Libyan intelligence official accused of building the bomb that destroyed Pan Am Flight 103 over Lockerbie in 1988, is likely to be postponed until at least April 2026. The proposed delay — requested jointly by US prosecutors and defense attorneys — must still be approved by a federal judge.
According to court filings, the main reason for the delay is the extraordinary complexity of the case. Much of the evidence is scattered across multiple countries, requiring extensive international cooperation, logistical planning, and legal coordination. This has made it difficult for both sides to prepare adequately for trial. [RB: A status hearing in the case is scheduled to take place on 5 June 2025 at 11.00 in Washington DC District Court.]
A central piece of evidence is an alleged confession Masud made in 2012 while imprisoned in Libya. Defense attorneys argue that the statement was obtained under duress and may be inadmissible in a US court. Legal arguments over whether that confession can be used at trial are expected to be contentious and potentially pivotal.
While the delay may frustrate families of the 270 victims — many of whom have waited decades for justice — it reflects the high stakes and legal sensitivities surrounding the case. Trying an international terrorism case involving decades-old evidence is inherently difficult. Political instability in Libya, the patchwork of international legal systems, and the reliance on potentially coerced testimony all complicate efforts to ensure a fair and thorough trial.
Adding another layer of complexity is the scheduled 2026 declassification of technical documents related to the Lockerbie disaster. These materials, believed to include engineering and forensic analyses of the explosion and aircraft damage, were reclassified after previously being slated for release — an unusual and controversial move. (...)
[Their] importance is underscored by the shadow of former FBI explosives expert [Tom] Thurman, a key figure in the original Lockerbie investigation. Thurman played a central role in identifying key forensic links — but his credibility was later seriously questioned. In 1997, he was removed from active casework after internal investigations found he had overstepped his authority by claiming scientific conclusions without proper credentials or peer review.
Knowing what is now publicly documented about Thurman’s methods, defense lawyers are expected to examine the forthcoming technical documents with particular intensity, looking for flaws, gaps, or contradictions in the forensic conclusions that originally shaped the indictment and public narrative.
Whether the timing of the trial delay and the documents anticipated release is coincidental or strategic, the outcome could be significant. If these documents (if released as planned) were to contradict past findings — or reveals alternative interpretations — it could reshape the courtroom dynamics entirely.
Ultimately, this is not just a legal trial, but a test of forensic accountability. Ensuring the evidence can withstand modern scrutiny is not a delay of justice — it may be the only way to achieve it.
[RB: A report also now appears on the BBC News website.]
Wednesday, 14 October 2015
Dramatic shortcomings and errors
Sunday, 18 April 2010
Reflecting on Lockerbie
On 21 December 1988, Pan Am Flight 103 from London Heathrow to [New York] exploded over Lockerbie, killing all 259 passengers and crew, as well as 11 people on the ground.
Just a few months earlier, a US Navy battlecruiser, the Vincennes, had shot down an Iranian passenger jet over the Persian Gulf, killing 290 people.
Not only did the US government refuse to apologise, but the Pentagon went into full cover-up mode, decorating the warship’s crew.
The Lockerbie bombing was soon attributed to the Syrian-based radical Palestinian group, the Popular Front for the Liberation of Palestine-General Command, as a revenge attack commissioned by the Iranian government.
Some weeks prior to Lockerbie, the German police had rounded up a Palestinian terrorist cell, in whose apartment they found equipment for fitting bombs into Toshiba radio-cassette players.
Unfortunately, not all of these barometric bombs were recovered – such a device was subsequently used at Lockerbie – and one of the key terrorists evaded capture.
By 1990, the crime had effectively been solved; however, at that point, the political background changed as a result of Iraq’s invasion of Kuwait.
The US and the UK now needed to court countries such as Syria and Iran so an alternative theory suddenly emerged in which Libya became the suspect.
In 2001, the case against two Libyans, Abdel Al-Megrahi and Al-Amin Khalifa Fhimah, was heard at Camp Zeist in the Netherlands before three Scottish law lords.
Gadaffi would have been briefed about the vagaries of the Scottish criminal justice processes, but he clearly did not appreciate it could be so obtuse.
It might have been anticipated that only the most reputable forensic scientists would be used but in fact the Crown employed the services of three men whose credentials were a disgrace.
The evidence of Dr Thomas Hayes in previous trials had contributed to the convictions of several innocent people and he was later publicly humiliated by Sir John May’s inquiry which slated him for ‘knowingly placing a false and distorted scientific picture before the jury’.
Allan Fer[a]day had the barest of qualifications in the field and was condemned by the Lord Chief Justice in 1996 who stated he “should under no circumstances be considered an expert witness in explosives cases.”
Then there was the American Tom Thurman, who was later sacked by the FBI for ‘routinely altering reports in the explosives unit’ to support the prosecution case.
Fhimah was acquitted but Al-Megrahi was unaccountably convicted on the basis that he had placed the bomb on board a feeder flight in Malta.
Not only was there no evidence that the bomb had been put on board in Malta, but Air Malta had won a libel action in 1993 establishing that it was not!
So the trial led inexorably to the wrongful conviction of Al-Megrahi and the final betrayal of the bereaved families.
Wednesday, 23 October 2013
Second batch of withheld Lockerbie documents released by Megrahi biographer
I am today releasing a second batch of important documents, most of which were withheld from Abdelbaset’s lawyers. All concern the forensic evidence and give a very different picture to that which the Crown presented to the trial court and the wider public. There are ten documents in all. The first five can be read here, along with a explanatory notes, and the second five here. My publisher, Birlinn has today issued the following press release:
Newly released documents show that police and prosecutors were aware of deep flaws in Crown case before Abdelbaset al-Megrahi’s trial for the Lockerbie bombing. The documents, which prosecutors had kept secret, directly contradict crucial trial testimony of the Crown’s lead forensic expert and fatally undermine the prosecution case.
Three of the documents concern the fragment of circuit board, known as PT/35b, which was allegedly from the bomb’s timer. Easily the most important physical evidence against Megrahi, the Crown alleged that it was from a batch of 20 timers that were supplied to Libya by Swiss company Mebo. The papers show that the Crown, police and forensic expert Allen Feraday were all aware of a crucial metallurgical difference between the fragment and the circuit boards used in the 20 timers. This disparity proved that the fragment could not have originated from one of the timers.
The papers, which are being released by Scotland’s Shame author John Ashton, also show that:
*Feraday privately harboured doubts about a crucial analysis conducted by the Crown’s other lead forensic expert, Dr Thomas Hayes.
*Feraday successfully urged the police to prevent tests that might have challenged his own conclusions about the bomb.
*Both he and Hayes were chronically overburdened by other casework.
*The police bitterly mistrusted Feraday’s American opposite number Tom Thurman.
Mr Ashton said: ‘These documents tear the heart out of the Crown’s forensic case. They also raises serious questions about the neutrality of the most important forensic witness. The Crown’s failure to disclose them to the defence is nothing short of scandalous. Such failures underline why the Scottish government must order a public inquiry in to the case.”
[The first batch of documents, relating to Tony Gauci, was released by Mr Ashton on 8 October.]