(Portland, OR) -- The Multnomah County Medical Examiner's Office is admitting it made a mistake last September, when it declared 23-year-old Portland resident Tyler Chase dead of a drug overdose. They gave his family an urn containing ashes, but they belonged to a stranger. They tell KPTV they discovered the mistake on December 18th and notified the family. Tyler's been in substance abuse recovery for months. The dead stranger was carrying Tyler's stolen wallet. The temporary paper Oregon Driver's license inside the wallet was used to identify the body. The Medical Examiner's Office is not naming the stranger, but they are promising a change in identification procedures.