Police have charged a US national with the killing of a Hurstville man whose body was found wrapped in plastic at Sydney Olympic Park last year.
The man, Alex Dion, was extradited from the US and on Sunday morning arrived at Sydney Airport and was taken to Sydney Police Centre.
He was charged with the murder of a 33-year-old Thai national, Wachira "Mario" Phetmang.
Mr Phetmang's body was found in plastic and covered in a mattress protector on June 6 last year, just near a on-ramp to Homebush Bay Drive.
In a statement on Sunday, NSW Police said they had established Strike Force Sinder to investigate the murder of the 33-year-old Mr Phetmang.
Detectives from that taskforce were granted an arrest warrant for a 38-year-old suspect who they suspected had already travelled overseas.
Mr Dion was arrested late last year in California on an unrelated matter. Detectives from Strike Force Sinder travelled to San Diego to assist with his extradition.
On Sunday he was refused bail and will on Monday appear at Central Local Court.
Mr Phetmang worked in hospitality and, prior to his death, was last seen in Hurstville.
His body was discovered by a truck driver.
The search warrant also said that police believed Mr Phetmang left a petrol station in Hurstville, where he was last seen, in Mr Dion's car. Police believe that Mr Dion later used a high-pressure washer to scrub his car, and dumped his and Mr Phetmang's clothes, two tyre irons and a metal bar inside a water retention tank, AP reported.
An autopsy on Mr Phetmang found that he had suffered multiple skull fractures and more than 20 wounds to the head. Mr Dion left Australia for the US two days after Mr Phetmang's death, AP reported.