A West Island teenager has been convicted of terror-related charges.

The teenager robbed a depanneur of $2,000 last year, money that he was planning to use to go to Syria and join Islamic State.

Instead he was turned in by his parents when they learned of the crime.

The teen pleaded guilty to the robbery, but unsuccessfully fought charges of attempting to aid a terrorist organization and trying to join a terrorist group.

In her ruling, Justice Dominique Wilhelmy expressed worries that the boy was so easily seduced by ISIS propaganda spread over social media.

"This is the sad story of a boy overwhelmed by messages of violence, vengeance and war carried out by the Islamic State," she wrote.

Crown Prosecutor Marie-Eve Moore said the next step will be recommending a sentence, which will take place in January.

"The court has requested a pre-sentence report, as well as a psychological evaluation, so we will wait for the result of those reports to judge what sentence we deem appropriate to suggest to the court," she said.

Moore said her preference is to have the teenager sentenced as an adult, which could mean life in prison. 

The boy, who cannot be identified because he is a minor, was 16 when he robbed the store.

His lawyer, Thiago Murias, argued the teenager did express an interest in going to Syria, but said the direct link between the theft and the trip had not been established.

During the trial the Crown presented evidence that the teenager tried to use his parents' credit cards to make donations to terrorist groups, and to buy plane tickets.

The Crown also showed the boy had been in contact with Martin "Ahmad" Couture-Rouleau, who three days after the boy's arrest killed a soldier with his car and wounded another in St. Jean sur Richelieu.

The boy had contacted Couture-Rouleau before the robbery and asked him for cash to buy a weapon.

Recordings played during the trial showed the boy, who immigrated to Canada when he was five, felt ashamed to be living among "infidels" in a country that did not practise Sharia law.