A fatal overdose in an inner city laneway has led to a manslaughter charge against a man alleged to have administered the drug.
Stephen Zachary Quartley, 37, was arrested at an address in Parramatta on Thursday following a months-long police investigation.
It comes after emergency services found a 45-year-old man unconscious in Parker Lane in Sydney's Haymarket on April 1.
He was treated at the scene by paramedics and taken to hospital in a critical condition.
On April 19 police were informed the man had died.
Following extensive inquiries, investigators executed a search warrant and arrested Quartley.
He was taken to Parramatta Police Station where he was charged with manslaughter, with police alleging he administered the fatal overdose to the older man.
His matter was mentioned in Parramatta Local Court on Friday. He did not apply for bail and will return to court in August.
