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The teenage girl pleaded guilty to aggravated robbery at Perth Children's Court
She was sentenced to 12 months in jail for the September 5 attack in Ashfield
Footage showed the girl pulling a pregnant mother to the ground by her hair
The mum-of-two was taking her twins for a stroll when she was brutally attacked
A 15-year-old girl who violently attacked a pregnant mum by slamming her to the ground with her hair as she pushed her two toddlers in a pram will spend at least a year in jail.
The teenage girl, who cannot be named for legal reasons, faced Perth Children's Court on Wednesday and pleaded guilty to aggravated robbery following the September 5 attack.
Judge Hylton Quail described the attack, which was captured on CCTV footage, as 'sickening'.
The girl was charged with six other offences in Ashfield, Midland and Midvale areas between August 30 and September 5 - including an attack on an 11-year-old girl.

The 15-year-old attacked a 37-year-old pregnant mum while she was walking her twins with a pram (pictured)

The teen was sentenced to 12 months in jail for the brutal attack (pictured)
The 15-year-old girl admitted to trying to rob the woman but claimed she was coerced into a series of crimes by her cousin while high on marijuana, WAtoday reported.
During the sentencing, Judge Quail addressed the normalisation of the girl's violent and anti-social behaviour caused by her dysfunctional upbringing.
'From very young she was exposed to a high level of alcohol and substance abuse,' Judge Quail said.
'She experienced a great deal of neglect and has been hospitalised on a number of occasions for serious injuries as a result of that neglect.'
The 15-year-old was sentenced to 12 months behind bars.
Terrifying footage from the incident showed the 37-year-old mum walking down a Perth laneway in Smallman Place, Ashfield, just before 1pm on September 5 when the teen approached her from behind.
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Darwin bouncer Hayden Summers sentenced this week for hit on US Marine
The soldier, Glen Thomason, was thrown out of Monsoon bar in the NT capital
He refused to leave telling bouncers he was a 'trained killer' and swatting the air
Summers retaliated with huge slap which a jury decided was 'unreasonable'
An Australian bouncer who slapped a US Marine outside a nightclub so hard it could have killed him has been jailed for three months.
Hayden Summers, 34, was sentenced to a three-year and three-month suspended sentence for hitting Glen Thomason on April 11, 2021.
Thomason had been thrown out of Monsoons bar in Darwin and entered into an argument with Summers who had sent the original bouncer away in an attempt to cool down the situation.
The soldier demanded to be let back in and told Summers he was a 'trained killer' before hitting out at the air in front of the bouncer.

Security guard Hayden Robert Bruce Summers was found guilty of unlawfully causing serious harm after punched and 'knocked out' American marine Glen Thomason (pictured, CCTV footage of the altercation)
The crowd controller then retaliated with an open-handed slap that landed with such force the marine was instantly knocked out and fell to the ground.
Summers was found guilty of unlawful assault on September 2 and was sentenced this week.
The court previously heard Thomason hit his head on the pavement spent 19 days in hospital followed by significant rehabilitation.
Defence barrister Peter Maley insisted that Summers acted in self-defence and did not intend to hurt Mr Thomason.
'All of the witnesses - most of which were other bouncers - gave unchallenged evidence that the US marine was aggressive and engaged in confronting behaviour,' Mr Maley told the court.
'They all say the marine would not leave or calm down and that he yelled and screamed.
'They all recalled him saying words to the effect of 'I could kill you, I'm a trained killer, I'm a US Marine'.'
Su
1 NEWS South Korean police arrested a woman over the deaths of two children whose bodies were found in suitcases in New Zealand.
Warning: This story contains details some readers may find disturbing.
A year before the bodies of two children were found in suitcases, the remains were moved between storage units at the same Auckland facility, Stuff understands.
A person with knowledge of the move said there were dead flies and rats in the unit – but there was no smell or clues to raise the alarm.
At a press conference in August, Detective Inspector Tofilau Faamanuia Vaaelua said the children, a boy and a girl who were primary school-aged, were believed to have been dead for “a number of years”, possibly three or four, before they were found.
A 42-year-old woman was subsequently arrested in South Korea on two counts of murder in September. The woman denied responsibility for their deaths, shouting “I didn’t do it”, to waiting Korean media.

David White/Stuff Police set up a cordon on Moncrieff Ave in Clendon Park after the discovery of two bodies in suitcases by an unwitting family.
Stuff understands the suitcases were moved in the second half of 2021 between different storage units at the same SafeStore Papatoetoe facility.
A spokesman from SafeStore said the company did not want to comment “as the police have asked so as not to compromise any investigation in progress”.
After being moved at the site, the suitcases holding the children’s remains were then sold in a storage unit auction with other items, including toys and furniture, and moved to a Clendon Park home in August 2022 before being discovered by the unwitting family who won the auction.
A police spokesperson said they could not comment on questions put to them by Stuff.
Neighbours described seeing members of the family opening a suitcase, then standing back as if in shock.

James Halpin/Stuff The human remains were taken home by a family after they won an auction for a Safe