The teenager has been named as Jared John Widdowfield Harrison.
A 39-year-old woman was on Saturday afternoon at police headquarters helping with the investigation, but is understood not to be under arrest.
The Police have described the boy’s death as ‘suspicious’. His next of kin have been informed and his family is being supported by specially-trained liaison officers.
Anyone with any information is asked to contact the Police on 612200 or Crimestoppers on 0800555111.
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