Father in 'revenge killing plot' arrested

The patriarch of a Sydney family allegedly involved in a revenge killing which saw teenager Brayden Dillon executed in his bedroom is to remain behind bars overnight.

Mohamed Abu-Mahmoud, 54, was arrested at Sydney international airport on Tuesday after stepping off a flight from the United States.

NSW Police allege he helped procure false affidavits following the murder of 15-year-old Brayden in April last year.

Abu-Mahmoud's son had allegedly been stabbed to death in a brawl involving Brayden's older brother in 2016.

The April 2017 murder was carried out in revenge, detectives allege.

Abu-Mahmoud briefly appeared via video link in Central Local Court on Tuesday wearing glasses and casual clothing just hours after he was arrested.

The court heard a "web of connectivity" existed between Abu-Mahmoud and five other players who are facing various charges related to the 2017 killing. Two men and a woman have been charged with murder.

Among them is the alleged orchestrator, Abu-Mahmoud's brother Abdul, who was arrested stepping off a plane from Thailand last week. He was denied bail last week.

The magistrate agreed with Abu-Mahmoud's legal representative that there was not enough time to hear the complex allegations required for a bail application and pushed the matter over to Wednesday.

Police raided a Yagoona home shortly after his arrest seizing items they say relate to the investigation.