A royal commission into juvenile justice in the Northern Territory is demanding to know how the media got hold of a document which appears to show offender Dylan Voller's plan to "deal with" corrections officers.
Margaret White says she and fellow commissioner Michael Gooda are "disturbed" by the leak of the document that was provided to the commission.
"It appears to be in breach of all the undertakings that have been given by parties with respect to documents," she said in a directions hearing on Friday.