A teenage girl on a terrorism charge allegedly wanted a classmate dead and plotted with a co-conspirator to carry out a shooting at a school, her bail hearing has been told.
The Darwin girl has been in custody since being charged with collecting or making documents likely to facilitate terrorist acts, an offence that carries a maximum sentence of 15 years in jail.
Her arrest on November 3, and that of a 14-year-old boy also charged with terrorism offences, followed a joint investigation by Australian Federal Police, Northern Territory Police and the domestic spy agency Australian Security Intelligence Organisation.
It emerged in court on Friday that the girl allegedly wrote in her diary she wanted a particular student dead as she plotted with her co-conspirator to attack a school.
The teen, who cannot be identified due to her age, attended the bail hearing by video link, with many of her family in the public gallery.
Prosecutor Hadi Mazloum told Judge Greg Macdonald the primary concern was the risk to community safety given the extreme seriousness of the alleged offending including the "risk of ideologically motivated violence".
"The risk to community safety would remain unacceptably high," he said.
Mr Mazloum referred to the girl's diary in which she displayed specific anger.
"It names a particular student and says that she wants her dead."
She also shared a plan with her alleged co-conspirator to carry out a shooting at a school, the prosecutor said.
The girl needed to show exceptional circumstances applied to her case, to be granted bail, and the Crown contended such circumstances did not exist.
Defence lawyer Brooke Houen said the girl had significant psychological circumstances, being diagnosed with ADHD at age six and it was suspected she had autism.
Being in custody would not be good for her welfare or treatment, especially as there was likely to be a long wait before a NT Supreme Court trial of her case, Ms Houen said.
She argued for a community-based order centred on the girl's supportive family providing 24/7 adult supervision.
The girl had already been referred to a counter-terrorism rehabilitation program, the court heard.
Her family was exploring employing a private tutor to help her educational difficulties, given an anticipated diagnosis of autism and dyslexia, Ms Houen said.
Guns previously stored in the home had been removed, the court was told.
An earlier hearing was told the girl had tried to access a gun safe at her home but failed.
The girl had agreed to abide by all bail conditions and understood the nature of the serious charges against her, Ms Houen said.
"Her primary goal is returning home to her family and she's willing to do whatever is necessary to achieve that," Ms Houen said.
Judge Macdonald adjourned the matter till Monday for a decision on bail.
The girl's alleged co-conspirator, a 14-year-old Darwin boy, was charged with collecting or making documents likely to facilitate terrorist acts, possessing and sharing extremist material and manufacturing firearms offences.
His bail application is also expected to be decided on Monday.
Kids Helpline 1800 55 1800 (for people aged 5 to 25)
