Assange fears being beaten up in US prison, called Trump crowd 'clowns': Visitor Assange faces extradition to the U.S. on a charge of computer hacking conspiracy

After nearly seven years holed up inside the cramped Ecuadorian Embassy in London, WikiLeaks founder Julian Assange is dreading the prospect of violent attacks on him in an American prison, one of his regular visitors told ABC News' The Investigation podcast on Thursday.

In an interview for ABC News’ “The Investigation” podcast conducted one day after Assange's long-anticipated arrest by London police and court appearance on a 2012 bail jumping warrant and U.S. extradition request, one of his most frequent visitors described Assange’s fears of being sent to a US prison and subjected to violence inside.

"He did say he was worried that, if he was in a normal American prison, being beaten up,” war documentary filmmaker and former Taliban hostage Sean Langan, who has spent more than 50 hours with Assange in the past year, told ABC News. Langan’s last visit to Assange at the embassy was on March 22, he said.

“And then I said, 'Well, the chances are you're most likely’ -- slightly gallows humor, it didn't make him feel better – ‘you're most likely going to be put into one of those federal Supermax prisons where you won't see a soul," said Langan, an ABC News contributor.

Perhaps most surprising to many who saw his leaks of embarrassing Democratic party emails during the 2016 campaign -- which Special Counsel Robert Mueller has alleged were hacked by Russian spies in an effort to hurt rival Hillary Clinton's chances -- Assange was often sharply critical of Trump in casual conversation with a handful of visitors.

Langan says Assange described longtime Trump friend and political adviser Roger Stone and Donald Trump Jr. as intellectually incapable of a conspiracy, much less one that included WikiLeaks or him, and he rejoiced when Special Counsel Robert Mueller recently closed his investigation without indicting him for conspiring with Russian military intelligence to tilt the U.S. election.

"'Those bunch of clowns' -- that was the exact quote -- 'those bunch of clowns couldn't conspire and organize this kind of thing'," Langan recalled Assange telling him. "He certainly did not hold [President Trump] in high regard. He was quite dismissive."

Langan and Vaughan Smith, an Assange confidant and owner of London's Frontline Club, began making "social visits" -- as the Ecuadorian Embassy called them -- with Assange in early November. The pair was among the first people summoned by the controversial publisher of sensitive secrets after Ecuador lifted a ban on his visitors and most of his communications, a loosening of restrictions on Assange that lasted six months in 2018.

Inside, they didn't find an apartment littered with cat dropping or feces on the wall -- as alleged by his Ecuadorian hosts who over time turned against their notorious asylee -- but instead the "claustrophobic" quarters of a man in poor health toughing out intense surveillance of the tiny rooms he has occupied since entering the embassy in August, 2012.

That year, fearing he would extradited to the United States, Assange skipped out on his bail during a rape inquiry in Sweden. The rape inquiry was dropped two years ago but reopened today in the wake of Assange’s removal from the embassy in London, Swedish prosecutors said. Assange has denied the rape allegation.

Assange shared his recollections with Langan in five-hour rolling conversations at a table between two speakers meant to deter electronic surveillance by Ecuador or other countries. One speaker blared symphony music and the other David Bowie's "Space Oddity," Langan told ABC News.

Asked about a controversial November, 2018 report in the Guardian newspaper that Assange had met with Trump 2016 campaign manager Paul Manafort -- since convicted on financial crimes related to lobbying in Virginia and in Washington -- he was adamant it never happened. "He said, 'That's [bull]. Never met him.' So he strongly denied that," Langan said.

The Guardian report has not been matched by any other major news organization or corroborated since it was published.

Langan said that Assange seemed to acknowledge that he had communicated with Guccifer2.0, an online persona Mueller has said in a U.S. indictment was really an amalgam of Russian spies who stole the Democratic party emails and coordinated with WikiLeaks to leak them, but said that he believes Assange was unaware of Guccifer 2.0’s true identity.

Langan said that Assange complained to him that other news outlets were communicating with Guccifer2.0 too but the U.S. government was unfairly picking on him.

"I took it to be a non-denial denial," Langan said.

With his arrest and the prospect of a trial in the U.S. for computer intrusion relating to WikiLeaks document dumps of military and intelligence secrets almost a decade ago, Langan said Assange now realizes "that he could face the rest of his life in isolation."

The idea of further confinement weighs on Assange, he said.

"You can see the toll it is taking on him,” Langan added. "It's an unpleasant thing to see in any man."

He is no doubt glad to be out of the embassy, however, Langan added.

"It's like a gilded cage. But a cage is a cage is a cage," said Langan.

Smith always brought lunch from the club and Assange would fetch plates to serve the food on, then step back into his tidy galley to wash each plate after they dined.

Langan said Assange expressed frustration with what he described as false news reports that claimed Assange wore smelly socks and did not care for the cat his kids gave to him as a gift.

"That really hurt him," Langan recounted.