A US citizen accused of murdering a Thai associate whose body was found bound and gagged on a Sydney roadside has formally been refused bail.
Alex Dion's case was briefly mentioned in Sydney's Central Local Court on Monday after he was extradited from California and arrived back in Australia on Sunday.
The 38-year-old is charged with murdering Wachira "Mario" Phetmang between 7.30 pm on May 25 and 9pm on May 27 in 2018.
Mr Phetmang's body was discovered by a truck driver in June 2018. It was wrapped in a plastic material and covered with a mattress protector.
The 33-year-old, who had been living in Australia for the past 10 years, died of significant head injuries, according to police, who believe he was killed at a unit in Belmore.
Detective Superintendent Scott Cook said Mr Phetmang and Dion were associates but added police did not know the full extent of their relationship.
"The motive appears unclear at this stage," he told reporters on Monday.
Dion did not apply for bail on Monday and the case was adjourned to June 11.
Prosecutors withdrew a June 2018 charge of dishonestly obtaining a financial advantage by deception.
Australian authorities issued a warrant for the arrest of Dion, a US national, in September 2018.
Det Sup Cook said Mr Phetmang's family were devastated by his murder.
"They're still upset. Arrests like this don't bring victims back, so they don't satisfy the families in terms of bringing victims back," he said.
"But they are satisfied that the police have done all they can do to bring someone to justice for this."