WA teen prison riot 'entirely predictable' A RIOT at Western Australia's only juvenile detention centre earlier this year was entirely predictable, a report shows. In a report to be tabled in parliament on Wednesday, Inspector of Custodial Services Neil Morgan said there were risks associated with cramming in young offenders from the Rangeview juvenile remand centre to Banksia Hill late last year. Those risks were writ large on January 20, when the teen detainees went on a rampage, trashing 108 of 240 cells at Banksia Hill and incurring about $400,000 damage. Mr Morgan concluded the Department of Corrective Services placed insufficient weight on security risks at Banksia Hill and did too little to address those risks as they became increasingly evident. "It is of particular concern that the department failed to follow through on some specific risk mitigation strategies to which it committed in formal advice to the then Minister for Corrective Services in April 2012," he said. There was no rational explanation for the department allowing the Rangeview prisoners to be moved when its security directorate considered Banksia Hill was "at crisis point and the risk of a major incident is very real," Mr Morgan said. "The precise events of 20 January were not predictable," he said. However, given the risks at Banksia Hill itself and the lessons to be learned from earlier reports into prison riots in Western Australia, a major security incident was entirely predictable. After the riot, dozens of young offenders were moved to the nearby Hakea Prison for adults, fuelling anger among their parents and concerning Amnesty International, which backed their unsuccessful bid to challenge the legality of the transfer in WA's Supreme Court. And the union for youth custodial officers has demanded extra upgrades and security measures at Banksia Hill, on top of necessary repairs, saying it feared for the safety of staff and inmates if conditions were left ripe for another riot. Mr Morgan said there were several weaknesses in the security culture at the facility, but some solutions were "not rocket science." "Idle, bored children will invariably become frustrated and are very likely to act out their frustrations," he said. Bars and grilles will not stop this and it is essential that Banksia Hill returns to providing a full and active regime including rehabilitative programs and recreation. The union is also concerned about chronic understaffing at the centre, with a disproportionately high number of guards on workers compensation leave, compared with other states and territories. It wants all security concerns to be addressed before the juvenile offenders are moved from Hakea Prison back to Banksia Hill by August 26. Some inmates have trashed their cells on two occasions since being transferred to Hakea.