TELL us who the killers are and "we will look after you".
That's the promise NSW Police Commissioner Andrew Scipione has made to witnesses brave enough to speak out about a "very specific and targeted" double shooting in Sydney's west.
Roy Yaghi, 33 and Jamie Grover, 27 were gunned down execution style as they sat in a ute parked outside what police have described as a known "drug house" at South Wentworthville on Thursday night.
The pair managed to drive about 150m down the road before crashing into a front yard.
They were taken to Westmead Hospital in a critical condition and died soon after.
As riot police were called to the hospital on Friday to calm distraught family members demanding access to the victim's bodies, Mr Scipione pleaded with those in the know to break the criminal code and contact police.
He described the "wall of silence" surrounding western Sydney's criminal network as "hideous" and said a solution would never be reached without a change in attitude.
"There are people out there who know who has done this and I would say 'be part of the solution, come and help us break it down," Mr Scipione said
"They need not fear - we will look after you."
The western suburbs have been rocked by a seemingly endless string of shootings this year but Mr Scipione said if it was of "small comfort" to the community, Thursday's shooting was not related to the recent drive-bys.
He said the attack was not random and was likely linked to bad blood stemming from previous crimes.
Police have also confirmed both men were well-known to them.
One of the victims, Mr Yaghi, had been shot and injured before.
Anyone with information can phone Crime Stoppers on 1800 333 000.