Hassan N. Diab (Arabic: حسن دياب; born November 20, 1953) is a Lebanese-Canadian citizen and sociologist who has been convicted in absentia of having planted the explosive that caused the 1980 Paris synagogue bombing.^[1] He has always countered the accusation by insisting he was in Lebanon, and has witnesses and evidence to prove it, at the time of the event.^[2][3]

In 2008, France requested his extradition for his alleged involvement in the bombing. After a lengthy extradition hearing, on June 6, 2011, the Canadian extradition judge described the evidence as "convoluted, very confusing, with conclusions that are suspect" and stated that "the prospects of conviction in the context of a fair trial seem unlikely". However, the judge said that his interpretation of Canada’s extradition law left him no choice but to commit Diab to extradition.

On April 4, 2012, the Minister of Justice, Rob Nicholson, ordered Diab extradited to France. Diab's appeal to the Ontario Court of Appeal was rejected and the Supreme Court of Canada refused to hear the case. On November 14, 2014, Hassan was extradited from Canada to France where he was imprisoned for three years and two months without trial while the investigation continued.^[4]

On January 12, 2018 the charges against Diab were dismissed, after the investigative judges found the evidence for his presence in Lebanon at the time consistent,^[2][5] and two days later he returned to Canada.^[6] Three years later, in January 2021, the Paris Appeals court reversed the dismissal of charges and ordered that he stand trial. On May 19, 2021, France's highest court of appeal, the Court of Cassation ordered the trial to go ahead. Evidence presented against him in France included a sketch of the bomber that resembled him and the discovery of a passport in his name with entry and exit stamps from Spain, where the bomber is believed to have fled.^[7] On April 21, 2023, Diab was convicted of terrorism charges in absentia and sentenced to life in prison.^[1]

Diab's supporters allege that he was wrongly charged, that fingerprint evidence from the crime scene which exculpated him had not been admitted, that the 'smoking gun' evidence suggesting he had used a second passport to enter Spain at the time consists of a faded passport facsimile for which the original has not come to light, and that evidence corroborates his alibi that he was in Lebanon at the time of the attack.^[2]

Diab was born in Lebanon on November 20, 1953, and studied sociology at the American University of Beirut. He received a PhD from Syracuse University in Syracuse, New York. He became a Canadian citizen in 1993, and moved to Ottawa in 2006. He holds dual citizenship.^[8]

Diab was arrested by the Royal Canadian Mounted Police (RCMP) on November 13, 2008, at the request of French authorities who wanted him extradited to stand trial for his alleged role in a 1980 bombing outside a synagogue on Rue Copernic in Paris. He faced charges of murder and attempted murder in connection with the bombing, in which four people were killed and dozens injured by the detonation of about 10 kilograms (22 lb) of explosives hidden in the saddlebags of a parked motorcycle.^[8][9][10]

Diab denies all charges.^[11] His lawyer said the arrest was "a mistaken identification", and that Diab did not enter France in 1980.^[8] Friends, colleagues and former professors of Diab expressed shock and bafflement at the news of his arrest. His thesis adviser, Louis Kriesberg, a noted scholar of conflict resolution,^[12] said he never knew Diab to be in any way antisemitic and called the news "not credible".^[13]

In early July 2009, Diab was hired to teach a summer course in introductory sociology at Carleton University. On July 28, the day after a bail hearing disclosed his employment and subsequent teaching, B'nai Brith Canada released a statement condemning Carleton for employing a suspected terrorist. "We find it deplorable that university officials believe that there is nothing wrong with employing Diab. The safety and security of the community as a whole, and of the Carleton University campus in particular, are of great concern to us." The Toronto-based national office of B'nai Brith issued a statement condemning Carleton's actions, while an Ottawa-based member of the group telephoned the university directly to complain.^[14][15][16]

The university confirmed to the CBC that Diab was teaching the course. Later that day, university officials cancelled Diab's contract and named a replacement, stating that Diab had been replaced "in the interest of providing students with a stable, productive academic environment that is conducive to learning." "The university did the right thing," B'nai Brith's executive vice-president, Frank Dimant, said of Carleton's about-face in not allowing Diab to teach."^[15][17][18]

Some Carleton University professors supported Diab, stating that his termination violates the university's contract obligations.^[10] The Canadian Association of University Teachers (CAUT) issued a press release condemning the actions of Carleton's administration.^[18][19]

Based on information from intelligence agencies of Germany obtained from former members of the group, French authorities allege that Diab was a member of the Popular Front for the Liberation of Palestine, the group blamed for the bombing.^[20] Evidence unsealed as part of the extradition case, in April 2009, included two police sketches made some time after the bombing. Samples of Diab's handwriting, while a student at Syracuse University years later, were subjected to handwriting analysis. The sample of Diab's Syracuse handwriting was compared to the writing on a Paris hotel registration card filled out under the alias Alexandre Panadriyu. One French expert stated that the handwriting was definitely Diab's, though it appeared efforts had been made to change it. Another French expert said Diab could have written the registration card.^[9][21]

In October 2009, Diab’s lawyer submitted to the Canadian court several reports produced by experts in Canada, the United States, France and the United Kingdom. The lawyer informed the court that intelligence experts were prepared to explain the difference between evidence and intelligence and its "inherent secrecy and non-disclosure". Moreover, handwriting experts, including a top British expert, characterized the evidence tendered by French authorities as "demonstrably false". The Crown, on behalf of France, retracted the evidentiary nature of its original handwriting experts and asked the court for more time in order to obtain another opinion.^[22] The evidence was withdrawn when Diab's lawyer showed that the comparison handwriting samples used were not written by Diab.^[23]

The reports were the subject of an evidentiary hearing in December 2009. At the end of the hearing, the judge decided that the defence was permitted to file reports from all of their four handwriting experts, and could call any two of these experts to testify at the extradition hearing. The Crown would be allowed to cross-examine all four of the defence handwriting experts if it so chose. The defence called University of Toronto law professor Kent Roach to testify as an expert on the issue of intelligence as evidence at the extradition hearing; he testified as to the unreliability of using intelligence as evidence on November 24 and 25, 2009, in Ottawa.^[24]

An extradition hearing had, temporarily, been scheduled to begin in January 2010.^[25] However, on December 18, 2009, the Crown Attorney (representing The Attorney General of Canada) requested an adjournment of the hearing to review the defence evidence. The next possible date for the extradition hearing was to have been June 2010.^[26]

The judge hearing the case stated that he wanted to start the flow of evidence soon and suggested that he was becoming weary of delays by the French government in presenting its case.^[27] The hearing was scheduled to begin on November 8, 2010.^[28]

On May 17, 2010, the hearing scheduled to begin June 14, 2010, was again delayed after France disavowed the evidence of two handwriting experts discredited by the defence.^[29] The Crown planned instead to introduce evidence from a third, new French handwriting expert, who found a "very strong presumption" that Diab was the author of the hotel registration card.^[29] Kent Roach, the expert defence witness, accused the French government of "dragging its feet", "cherry picking evidence" and "bootstrapping" by requesting a delay while justice officials in Paris gathered more evidence.^[30] Defence counsel called the Crown's new plan "absolutely scandalous". He went on to say, "At the 11th hour and 59th minute they withdraw their entire handwriting case and substitute a new case."

Diab's lawyer also accused French authorities of finding a new handwriting expert in an attempt to save their case after the two they originally used were discredited by four defence handwriting experts, including a former RCMP document examiner. On December 6, 2010, the presiding judge ruled to allow the testimony of three more defence handwriting experts, but said that he would not necessarily give it any weight in his final analysis.^[31][32]

A former RCMP forensic document examiner, Brian Lindblom, was retained by the defence and testified on December 13, 2010, on the handwriting analysis submitted by France's new, and third examiner, Anne Bisotti. Stating that the new report submitted by the Crown was "often confusing and incomprehensible", Lindblom criticized the mandate given to Bisotti, by Magistrate Marc Trévidic. Trévidic instructed that the analysis be done to "'determine if he (Diab) is certainly or may be the writer.' There appears to be no room for an objective consideration of the possibility that the author of the sample material may not be the writer; he is presumed to be the writer." "The mandate is designed not to seek objective evidence," Lindblom testified. Bisotti's handwriting analysis was the third sent to the court after France disavowed two previous analyses when the defence demonstrated their unreliability.^[33]

Robert Currie, a professor of international law at Dalhousie University in Halifax, as well as other lawyers (including Donald Bayne, who acted for Diab), have cited the Diab affair as an illustration of flaws in Canada's Extradition Act.^[42] In May 2018, Amnesty International and the British Columbia Civil Liberties Association jointly called for the federal government to launch a thorough and independent inquiry into Hassan Diab’s extradition to France, including the conduct of Canadian officials during extradition hearings.^[43][44]

In 2018, Minister of Justice Jody Wilson-Raybould ordered reviews of the extradition.^[45] Murray Segal was appointed to conduct the external review. Segal's findings were provided to Wilson-Raybould's successor, David Lametti, in May 2019, and subsequently made public several months later. The review cleared Canadian prosecutors of any wrongdoing, but also made recommendations to improve the extradition process.^[46] Diab's lawyer, Donald Bayne, called the review a "whitewash".^[47]