Junaid Hussain (Abu Hussain al-Britani)

Ardit Ferizi was detained in Malaysia last October for allegedly hacking into a computer database and passing information about US security staff to Islamic State radicals.

Ferizi was extradited from Malaysia and appeared on Wednesday in a US court in Virginia facing terrorism charges. If found guilty, Ferizi could face 35 years in prison.

The father of Ardit Ferizi, who was arrested in Malaysia for allegedly breaking into a US company's computer system, taking the personal details of more than 1,300 US military and government staff and passing them to an Islamic State militant, admitted on Friday that his son had been in trouble for hacking before.

The Malaysian authorities arrested Ferizi on Thursday on a US arrest warrant alleging that he hacked into a US company's computer system, took the personal details of more than 1,300 US military and government staff and passed them on to an Islamic State militant.