Premier Roger Cook has confirmed parents at Rossmoyne Senior High School repeatedly attempted to raise concerns about the 16-year-old teenager shot dead by police after stabbing a stranger in an act of “jihad”.The boy — who The Nightly has chosen not to name — had already spent two years as part of a countering violent extremism program when he embarked on his violent rampage late on Saturday night.It is suspected the teenager was radicalised online, with Mr Cook revealing he had been limited to a “very basic telephone” that did not have internet access.Sign up to The Nightly's...…Premier Roger Cook has confirmed parents at Rossmoyne Senior High School repeatedly attempted to raise concerns about the 16-year-old teenager shot dead by police after stabbing a stranger in an act of “jihad”.The boy — who The Nightly has chosen not to name — had already spent two years as part of a countering violent extremism program when he embarked on his violent rampage late on Saturday night.It is suspected the teenager was radicalised online, with Mr Cook revealing he had been limited to a “very basic telephone” that did not have internet access.Sign up to The Nightly's...WW…