Comancheros boss Tarek Zahed, 41, and his brother Omar, 39, have been gunned down within the lobby of a gymnasium in Auburn on May 10.
Omar died on the scene, whereas Tarek sustained a number of bullet wounds, together with one to the pinnacle, however survived.
Two Audi Q7 vehicles have been discovered on hearth at Berala and Greenacre a short while later.
Detectives yesterday arrested a 22-year-old man at Sydney Domestic terminal at about 10.30pm yesterday.
He was charged with concealing a critical indictable offence.
The man was refused bail and can seem in courtroom right now.
The investigation is continuous.
Anybody with data is urged to contact Crime Stoppers or police.
