A Melbourne teenager who plotted to behead a police officer in an Anzac Day terror attack remains a danger to the community, a court has been told.
Crown prosecutor Jeremy Rapke, QC, says there's not enough evidence Sevdet Ramadan Besim has abandoned the extremist views that led to his plot last year.
"As of today, he remains a danger to the community," he told Besim's plea hearing on Tuesday.
"What we know today, the Crown says, is that he remains a radicalised young man."
Besim has admitted plotting a gruesome attack where he would run down a police officer and behead him in a rampage that would ultimately end in his own death.
The 19-year-old Hallam teen chose Anzac Day to "make sure the dogs remember this as well as there fallen heros (sic)".
He said he was "ready to fight these dogs on there (sic) doorstep".
"I'd love to take out some cops," Besim said in online chats with a UK teenager, where he discussed his deadly ideas.
"I was gonna meet with them then take some heads ahaha."
The Victorian Supreme Court has been told an immature Besim was radicalised by older, influential extremists he met at the now defunct Al-Furqan Islamic Centre, including senior Islamic State recruiter Neil Prakash.
He was also greatly affected by the 2014 death of his friend Numan Haider and became alienated from mainstream society, his barrister George Georgiou, SC, told the court.
Haider, 18, was shot dead outside Endeavour Hills police station after stabbing two counter-terrorism officers.
Besim was with him in the hours before the attack.
According to Besim's psychologist, he now overtly rejects violence and says he has changed his extremist views.
Besim told the expert it was a gradual process involving regular contact with imams from the Islamic Council of Victoria, coupled with reading and reflections while in custody.
Mr Rapke did not believe Besim was telling his psychologist the truth.
Corrections Victoria found a hand-drawn IS flag in his jail cell in September and a collection of newspaper clippings about violent jihadis fighting overseas.
One of the articles referred to Australian terrorist Khaled Sharrouf, who gained infamy after his son was pictured holding a severed head.
Besim, who has pleaded guilty to one count of conspiring to do an act in preparation for or planning a terror act, is being held in protection.
His plea hearing continues on Wednesday.
