Shocking video showing a 17-year-old boy being strapped into a mechanical restraint chair in the Northern Territory

Shocking video showing a 17-year-old boy being strapped into a mechanical restraint chair in the Northern Territory in March 2015 has been obtained by Four Corners. Key points: Vision shows repeated stripping, assault and mistreatment of a boy Boy transferred to adult prison, strapped to chair for almost two hours His treatment in Youth Detention was the subject of a confidential investigation by NT's former children's commissioner It is part of a chilling catalogue of vision released for the first time showing the repeated stripping, assault and mistreatment of the boy, who was one of six children tear-gassed at the Don Dale Youth Detention Centre in Darwin in 2014. The boy in the chair is Dylan Voller, who was a detainee at the Youth Detention Centre in Alice Springs at the time. The footage, along with other instances of mistreatment highlighted on Four Corners, prompted Human Rights Commissioner Gillian Triggs to call for a formal inquiry.