The Latest Breaking News from Hylton Quail

A 17-year-old boy with an extensive criminal record has been sentenced to an adult prison after engaging in riots in troubled youth detention facilities.

A Perth teen who lay in wait behind a wall before throwing a concrete block that fatally injured a pregnant mother will serve five years in detention.

The use of a 'figure four' or 'folding up' restraint technique in WA correctional facilities is set to be reviewed, with Premier Mark McGowan also announcing a meeting with key stakeholders over Banksia Hill Detention Centre.

The former head of WA's Children's Court has called for a Royal Commission into the state's juvenile justice system as the fallout over the treatment of youth offenders in the state reaches boiling point.

Video footage shows how children are being treated in a youth detention facility facing allegations of excessive force and unlawful confinement.

Former custodial services inspector Neil Morgan and former Children's Court judge Denis Reynolds are the latest to slam the "appalling" treatment of children at Banksia Hill jail, as the WA Premier continues to defend the transfer of some to an adult prison.

A senior Perth judge accuses the WA government of "flouting the law" and "thumbing its nose at the court" in relation to the ongoing detention of juveniles inside an adult prison.

Mark McGowan says he disagrees with the state's children's court and the way it is handling some juvenile detainees in the latest escalation over the detention of teenagers in part of an adult prison.

The WA government is warned it risks being found in contempt of court for continuing to house juvenile detainees in an adult prison, with a senior Perth judge describing what's happening as 'barbaric", "cruel" and "a form of child abuse".