A window cleaner was found dead in his room by his landlord after taking a heroin overdose, an inquest heard.
Aaron Baker, 27,of Wilding Road, Wallingford, died in his bed after smoking heroin on January 29.
He was found the next evening by his landlord Kevin Morley.
Mr Morley said Mr Baker had lived with him for two years but did not know he was a heroin user.
After Mr Morley found him, he called for an ambulance and Mr Baker's best friend, Benjamin Gascoyne.
Mr Gascoyne went into the room and checked for a pulse and then put Mr Baker's head on his chest, but he was already dead.
He told Oxford Coroner's Court that he knew his friend had smoked heroin occasionally in the past but thought he had stopped.
Mr Baker had spent the evening before he died with friend Mark Wetherall watching football.
Mr Wetherall told the court they had smoked cannabis together that evening.
A post mortem revealed Mr Baker had 56 microgrammes of morphine per litre of blood, but no cannabis was found in urine samples.
Oxford Coroner Nicholas Gardiner recorded a verdict of accidental death.
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