Authorities said Brody John McMahon may be able to assist with a current investigation.
Armadale Detectives believe the 18-year-old may be able to assist with ongoing inquiries into several recent incidents in the South East Metropolitan and Central Metropolitan districts.
Mr McMahon may behave in an unpredictable manner and if sighted, members of the public are advised not to approach him but to call police immediately on 131 444.
He is described as having a fair complexion, approximately 175cm tall with a medium build, short cropped blonde hair and blue eyes.
                            
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