Police have vowed to continue their quest for justice over a nearly three-decade-old murder after a request to extradite the alleged killer was knocked back.
James Dalamangas was arrested in Greece on June 7 in the Peloponnesian town of Aigio, according to local media reports.
The 55-year-old had been living under a pseudonym in Greece since a warrant was issued for his arrest over the death of George Giannopolous.
The father-of-two was fatally stabbed on Anzac Day in 1999 after intervening in a fight at a suburban Sydney nightclub.
NSW Police said they were aware Greek authorities would refuse a request from Australian police to extradite Dalamangas because the alleged crime falls outside Greece's statute of limitations.
"James Dalamangas remains one of Australia's most wanted," a NSW Police spokesman said in a statement.