Prosecutors told the court that Thomas, a 31-year-old convert to Islam, met bin Laden on more than one occasion while training at an Al-Qaeda camp in Pakistan.
They alleged that Thomas continued to associate with people linked to Al-Qaeda after the group carried out the September 11, 2001, attacks on the United States.
He was allegedly approached by one Al-Qaeda member on behalf of bin Laden to return home to Australia and act as a "sleeper" for the organisation, the court heard.
On the tear-jerking side:
His mother, Patsy Thomas, said her son's imprisonment was emotionally draining for the whole family.
"Not to be able to touch him and cuddle your child and to not be able to touch and cuddle his children is heartbreaking -- we feel it," she told ABC radio earlier Thursday.
"One hour a month Jack is allowed to have contact with his two little girls," she said.
"The rest of the time he only sees them on the other side of the glass with us (for) one hour a week."
It's so sad. I guess all the time he spent in terrorist training camp was not as emotionally taxing on the family...and the allegation that he was an Al-Qaeda "sleeper" bothers them not...