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An Auckland teenager used a mobile phone to record other students from the school apparently smoking cannabis - then turned the recording over to school authorities.
The unusual situation left the Auckland high school's board of trustees scratching their heads over whether they could use the images when investigating. Ron Mulligan, of the NZ School Trustees Association, said at the association's conference in Christchurch yesterday it was one of the first cases of its type.
"The school had never come across it before, and we never had."
Mr Mulligan said the association advised the school it could use the images in its disciplinary proceedings about a month ago.
He said a school representative told him they intended to take still images from the footage to reduce the chance of indicating where the camera operator was standing - and, in turn, identifying who filmed the scene.