Man Faces Murder Charge After Being Extradited From California

Homicide detectives have extradited and charged an American man over the alleged murder of a Thai cafe worker whose body was dumped on the side of the road at Sydney Olympic Park last year. 

Wachira 'Mario' Phetmang, 33, was found bound and gagged, wrapped in plastic and covered in a mattress protector on Homebush Bay Drive  on June 6.

A passing truck driver made the grim discovery about 10:30pm.

The man whose body was found dumped on a busy Sydney road on June 6 has been identified as Wachira 'Mario' Phetmang. Image: NSW Police

Phetmang, a Thai national and cafe worker, had been living in Australia for the last 10 years, most recently in the suburb of Hurstville.

He was last seen alive on May 25 at a nearby petrol station in South Hurstville. HIs body was found a fortnight later.

A post-mortem examination revealed Phetmang died from blunt trauma injuries and was “visibly beaten”.

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Detectives investigating Phetmang's alleged murder applied for and were granted an arrest warrant for Alex Dion, 38, who is believed to have left Australia on May 27 -- more than a week before the body was found and formal identification made.

They were notified late last year the man, a U.S. national, had been arrested in California over an "unrelated matter", NSW Police said.

Alex Dion arrives in Sydney after being extradited over the murder of Wachira 'Mario' Phetmang. Image: AAP

Earlier this week, detectives travelled to San Diego to extradite Dion to Australia.

He arrived in Sydney on Sunday morning and was taken to Sydney Police Centre where he was charged with an arrest warrant for the offence of murder.

Dion was refused bail to appear in court on Monday morning.

Featured image: AAP