A 12-year-old boy is holding a school hostage - as parents and teachers feel powerless to stop him.
The school is regularly placed into lockdown due to the boy's violent outbursts, it is claimed.
He even threatens to kill other students, according to reports in Australia.
Vanessa Turnbull said her son has been attacked multiple times by the violent child at a Melbourne school, and he often arrives home with bruises all over his body.
She told 3AW: " He's had a mild concussion and is constantly bruised from the child."
The mum said that the boy had touched girls inappropriately, threatened to kill people, stole money and beaten students with a cricket bat.

The boy - believed to have a 'tall build' - regularly forces the school of about 1,300 students to be placed into lockdown to protect other students.
She said: "Even the younger students are scared, they known when they hear the alarm that it's that child.
"Other parents and the department say he has the right to an education, which you would agree on, but when he's violent and and attacking others it's so disruptive.
"I mean kids don't want to go to school anymore."

The concerned parent said she could see how frustrated the teachers were with the issues.
"They've been really supportive and they have been consumed by the amount of issues and the parents complaining... they feel like their hands are tied, you can tell they feel empathy for us, I look in their eyes and I feel like they are being defeated a little bit," she said.
A teacher from the school confirmed the parent's comments and said many of them have threatened to quit over the way the boy's behaviour has been dealt with.