Jill Duggar drops off husband Derick at brother Josh Duggar's trial

Josh Duggar's sister Jill Dillard made a brief rare appearance outside court Tuesday while dropping off her husband at her brother's child porn trial.  

DailyMail.com spotted the reality star pulling up to the John Paul Hammerschmidt federal courthouse in Fayetteville, Arkansas, where her husband Derick Dillard, and other members of her family, has been a spectator at the proceedings.

The mom-of-two, who is the second-eldest daughter of Jim Bob and Michelle Duggar, did not join her relatives in the courtroom and drove off shortly after. 

Jill, 30, has been notably absent at the trial, where she her other brother Jed were chosen as potential witnesses last week. 

It was not revealed whether they would be called by either the prosecution or defense, however, both are yet to testify. 

Jill could serve as a key witness to the trial which recently heard evidence about her brother's molestation scandal, in which she was revealed to have been a victim when she was a minor.

Duggar is alleged to have confessed to his parents and a family friend in 2003 to molesting four of his sisters since he was 12. 

While several members of the Duggar clan - including Josh's father Jim Bob, brother Justin, and sister Joy-Anna, have been seen supporting Josh in court since the trial began last week, Jill is yet to make an appearance.  

Jim Bob Duggar was seen attending his eldest's son trial on Tuesday for the first time.

The father-of-19 was subpoenaed to give evidence at a pre-trial hearing but was ditched as a possible witness after insisting on the stand that he could barely remember anything about the molestation scandal that led to his family's reality show, 19 Kids and Counting, being canceled in 2015.

The Duggar patriarch kept a low profile Tuesday, ducking behind a concrete pillar when a photographer tried to take his photo outside the federal court building in Fayetteville, Arkansas.

He quietly slipped into the trial room and sat in the public gallery, several rows behind the rest of his family and Josh's wife Anna, nodding but not responding when asked by reporters how he was doing.

Jurors on Tuesday heard testimony from a defense witness who said Josh Duggar's internet network was so insecure someone could have hijacked his computer to remotely watch child porn in a so-called 'hit and run attack.'

Michele Bush, a computer forensics expert, told jurors that the internet at Wholesale Motorcars was on a low security setting called 'universal plug and play'.

The setup allowed multiple devices to seamlessly establish internet connections but it also left it 'extremely vulnerable' to what she described as a 'hit and run' attack.

She described a scenario whereby a remote user, or hacker, could potentially log on, do something nefarious, then quickly log off again without the account holder ever knowing.

Likening Duggar's network to a house, she said: 'All of its doors are unlocked. Anyone can come in and they can do what they want.' 

Bush disagreed with the government's case that a desktop could not be rebooted remotely. 

She also told jurors she felt it was a 'very viable possibility' that someone had accessed the Linux side of the computer remotely to download porn because it had been watched in streaming mode then quickly deleted.

However, without having the internet router – which the trial has heard the FBI never seized – and a definite list of machines that linked to it, she said it was impossible to say for certain who streamed the vile material and where they did so.

'If you had had the router would it answer those questions,' she was asked by defense attorney Justin Gelfand.

Bush replied: 'It would certainly give me a lot more clarity.   

With Jim Bob looking on, Bush told jurors she disagreed with the FBI's insistence that

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