The lead charge of aggravated robbery was laid after the teenager and an associate grabbed a man in a headlock in an alleyway in central Whangarei, dragged him to the ground, and took an iPhone, driver's licence and wallet containing about $60 cash.
In court, Crown lawyer Justin Wall and defence counsel Wiremu Puriri agreed with reports from health professionals, including a psychologist, that the teenager should be admitted to a care facility. The admission would be under the Criminal Procedure (Mentally Impaired Person) Act 2003.
Judge Duncan Harvey agreed, saying the prison environment was not suitable for someone who needed treatment for a number of difficulties identified by the psychologist.
He declined to make an order for reparation, saying such a directive would be "empty".