I t was a vivid scene worthy of the ending of a Hollywood thriller, the image of a ruthless terrorist mastermind finally brought to justice “whimpering and crying and screaming all the way” to his death. But it may be no more true than a movie script.

In the days since President Donald Trump gave the world a graphic account of Abu Bakr al-Baghdadi’s last minutes, no evidence has emerged to confirm it. The secretary of defence, the chairman of the joint chiefs of staff and the regional commander who oversaw the operation that killed the leader of Isis all say they have no idea what the president was talking about.

Four other Defence Department officials, speaking on condition of anonymity because they were not authorised to share details of the raid, said they had seen no after-action reports, situation reports or other communications that support Mr Trump’s claim. Nor did they have any indication that Mr Trump spoke with any of the Delta Force commandos or ground commanders in the hours between the Saturday night raid and his Sunday morning televised announcement.

One American official who is deeply familiar with the operation dismissed the president’s version of events as mere grandstanding. Another senior official briefed extensively on the mission said, “I don’t know how he would know that. It sounds like something he made up.” The surveillance drone video Mr Trump watched in the Situation Room had no audio.

The White House, for its part, has provided neither corroboration nor explanation of the president’s account. Stephanie Grisham, the White House press secretary, dismissed “trying to pick apart the details of the death” of the leader of Isis. “Is it not possible to just celebrate that a terrorist, murderer and rapist has been killed?” she asked in an email.

Timeline of the Isis caliphate Show all 19 1 /19 Timeline of the Isis caliphate Timeline of the Isis caliphate ISIS began as a group by the merging of extremist organisations ISI and al-Nusra in 2013. Following clashes, Syrian rebels captured the ISIS headquarters in Aleppo in January 2014 (pictured) AFP/Getty Timeline of the Isis caliphate Abu Bakr Al-Baghdadi declared the creation of a caliphate in Mosul on 27 June 2014 Timeline of the Isis caliphate Isis conquered the Kurdish towns of Sinjar and Zumar in August 2014, forcing thousands of civilians to flee their homes. Pictured are a group of Yazidi Kurds who have fled Rex Timeline of the Isis caliphate On September 2 2014 Isis released a video depicting the beheading of US journalist Steven Sotloff. On September 13 they released another video showing the execution of British aid worker David Haines Timeline of the Isis caliphate The US launched its first airstrikes against Isis in Syria on 23 September 2014. Here Lt Gen William C Mayville Jnr speaks about the bombing campaign in the wake of the first strikes Getty Timeline of the Isis caliphate Isis militants sit atop a hill planted with their flag in the Syrian town of Kobani on 6 October 2014. They had been advancing on Kobani since mid-September and by now was in control of the city’s entrance and exit points AFP/Getty Timeline of the Isis caliphate Residents of the border village of Alizar keep guard day and night as they wait in fear of mortar fire from Isis who have occupied the nearby city of Kobani Getty Timeline of the Isis caliphate Smoke rises following a US airstrike on Kobani, 28 October 2014 AFP/Getty Timeline of the Isis caliphate YPG fighters raise a flag as they reclaim Kobani on 26 January 2015 VOA Timeline of the Isis caliphate Isis seized the ancient Syrian city of Palmyra on 20 May 2015. This image show the city from above days after its capture by Isis Getty Timeline of the Isis caliphate Kurdish forces are stationed on a hill above the town of Sinjar as smoke rises following US airstrikes on 12 November 2015 AFP/Getty Timeline of the Isis caliphate Kurdish forces enter Sinjar after seizing it from Isis control on 13 November 2015 AFP/Getty Timeline of the Isis caliphate Iraqi government forces make the victory sign as they retake the city of Fallujah from ISIS on 26 June 2016 Getty Timeline of the Isis caliphate Iraqi forces battle with Isis for the city of Mosul on 30 June 2017 AFP/Getty Timeline of the Isis caliphate Members of the Iraqi federal police raise flags in Mosul on 8 July 2017. On the following day, Iraqi prime minister Haider Al Abadi declares victory over Isis in Mosul Getty Timeline of the Isis caliphate Members of Syrian Democratic Forces celebrate in Al-Naim square after taking back the city of Raqqa from Isis. US-backed Syrian forces declare victory over Isis in Raqqa on 20 October 2017 after a four-month long campaign Getty Timeline of the Isis caliphate Female fighters of the Syrian Democratic Forces celebrate in Al-Naim Square after taking back the city of Raqqa from Isis. US-backed Syrian forces declare victory over Isis in Raqqa on 20 October 2017 after a four-month long campaign AFP/Getty Timeline of the Isis caliphate Trucks full of women and children arrive from the last Isis-held areas in Deir ez-Zor, Syria in January 2019 They were among the last civilians to be living in the ISIS caliphate, by this time reduced to just two small villages in Syria’s Deir ez-Zor Richard Hall/The Independent Timeline of the Isis caliphate Zikia Ibrahim, 28, with her two-year-old son and 8-month-old daughter, after fleeing the Isis caliphate, on Saturday 26 January 2019 Richard Hall/The Independent

Pressed on where Mr Trump got the details he shared on national television, she said, “we are not going to get into any of the operational details of how the president receives information.” Asked if his account was true, she did not respond.

That Mr Trump seems to have made up the scene of a whimpering terrorist may be shocking on one level yet not all that surprising from a president who over the years has made a habit of inventing people who do not exist and events that did not happen. Mr Trump’s flexibility with fact has become such an established feature of his presidency that polls show most Americans, including even many of his own supporters, do not, as a rule, take him at his word.

What may be most telling about the episode is how little attention it received. In the past, presidential words were scrutinised in forensic detail for precision, and any variance from the established record could do lasting political damage. In the era of Trumpian truth, misstatements and lies are washed away by the next story, prompting Pinocchios from fact-checkers and scolding from Democrats and Never Trumpers while Republicans dismiss them with that’s-just-Trump-being-Trump weariness.

“Donald Trump is not simply a serial liar; he is attempting to murder the very idea of truth, which is even worse,” said Peter Wehner, a former strategic adviser to President George W Bush and an outspoken critic of Mr Trump. “Because without truth, a free society cannot operate.”

Mark K Updegrove, a presidential historian who wrote a book about Presidents George Bush and George W Bush, said neither of those commanders in chief nor President Barack Obama would have been so loose with the truth about so momentous an event. Events like the killing of Osama bin Laden, he said, were treated with solemnity and soberness.

“In the days of reality television, humility is not enough,” said Mr Updegrove, who is also president and chief executive of the Lyndon B Johnson Foundation in Austin, Texas. Mr Trump, the reality television veteran, “has to continue to add to the inherent drama of the moment, not only bragging about the despot being brought to justice but happening in the most humiliating way. He can’t help himself.”

Mr Trump’s account has left four-star generals in the awkward position of not confirming assertions they do not know to be true while trying not to contradict the president too overtly.

Defence secretary Mark T Esper and General Mark A Milley, chairman of the Joint Chiefs of Staff, both said they had not been told of such details, but allowed that it was possible the president had spoken with commandos involved in the operation – without explaining how that would have happened without the top civilian and military leaders of the Pentagon knowing about it.

The real consequence is that because it is clearly a lie, it breeds conspiracy theories or undermines the success of the mission Juliette Kayyem, former assistant secretary of Homeland Security

General Kenneth F McKenzie Jr, head of the US Central Command who oversaw the operation in Syria, said al-Baghdadi’s last act of killing children along with himself spoke for itself. “You can deduce what kind of person it is based on that activity,” he told reporters this week.

But as for the whimpering and crying, “I’m not able to confirm anything else about his last seconds. I just can’t confirm that one way or another,” Mr McKenzie added. In fact, he said, “we believe Baghdadi actually may have fired from his hole in his last moments.”

Mr Trump has always had an active imagination, on matters large and small. While in business, he called reporters pretending to be a Trump spokesman named John Barron boasting about Mr Trump in the third person. For years, he peddled the lie that Obama was born in Kenya instead of Hawaii, and he long claimed to see “thousands and thousands” of Muslims in New Jersey cheering the fall of the World Trade Centre on 11 September 2001, a claim that was thoroughly debunked.

Mr Trump has long cited a friend named “Jim” who supposedly told him about the decline of Paris, but news organisations have failed to ever confirm Jim’s existence. While president, Mr Trump boasted that the chief of the Boy Scouts once called him to praise his speech to its jamboree and asserted that the president of Mexico called to inform him about Mr Trump’s successful border enforcement. The White House eventually admitted that neither call took place.

In general, Mr Trump’s misadventures with the truth have been tabulated by The Washington Post, which has counted more than 13,000 false or misleading statements since he took office. The public is no longer surprised. In March, just 19 per cent of Americans said Mr Trump always tells the truth, according to a Reuters poll, while 40 per cent said he tells the truth only sometimes and 41 per cent said he never tells the truth.

That means that many of his own supporters agree that he sometimes lies.

The desire to portray al-Baghdadi in humiliating terms may stem from genuine disgust with a terrorist who beheaded American captives and was responsible for the deaths of so many during his five-year terror spree. Mr Trump made the point that no one should consider al-Baghdadi a hero, which is a point nearly every American official and counterterrorism expert would agree with.

Juliette Kayyem, a former assistant secretary of Homeland Security under Mr Obama, said the president’s descriptions of al-Baghdadi may not create the backlash others fear because there was no real cult surrounding him that would be further radicalised.

“The real consequence,” she said, “is that because it is clearly a lie, it breeds conspiracy theories or undermines the success of the mission.

“In other words, the impact of his gloating is more harmful to us,” she added, “and takes a winning moment that our allies needed and our enemies should fear and turns it into” a question of credibility.

And it has resulted in an unwanted headache at a Pentagon that would rather focus on the success of a mission that took the most-wanted terrorist in the world out of action. Asked if senior defence officials and military commanders wished the whole issue would just go away, one senior official sighed and said, “Yes, yes.”