That is it from Superintendent Jason Box.

To follow our coverage of this story head to the ABC News website.

When asked if police were looking at the "intended target", Superintendent Box said it was something investigators were looking into.

"I've said previously we're looking at anyone in the area, any other persons that might fit the profile."

Now that three men have been charged over the murder, Superintendent Box said detectives would still be investigating all lines of inquiry.

"We will see if there are any other persons that have been involved in the periphery, and we'll continue to look at that as part of the investigation," he said.

"Other lines of inquiry might open up."

Superintendent Box reiterated that cleanskin plumber John Versace had no known criminal connections

"There is nothing at all to suggest that Mr Versace was anything but a hardworking young man, living at home with his family, was much loved and trying to set himself up for the rest of his life.

"Nothing at all would suggest any links to any criminal entities at all."

When asked if the alleged gunman is "well known to police", Superintendent Box confirmed he was known to authorities.

"He's also known to associate with organised crime," Superintendent Box said.

"I wish to acknowledge the great work that has been done by the strike force," Superintendent Box said of Taskforce Falcon detectives.

"They have worked tirelessly and they have identified the three persons charged, [and] put them before the courts."

Superintendent Box noted there was still "a long way to go" in the case.

Superintendent Box is now speaking about the 21-year-old man charged over the murder of John Versace.

"This is the third person who has been charged in relation to the murder of Mr Versace."

Superintendent Box says police believe the 21-year-old is the alleged gunman.

Taskforce Falcon Commander Superintendent Jason Box will update the media after an alleged gunman was charged with murder over the May shooting of John Versace in Condell Park.

Mr Versace, a Sydney cleanskin plumber, died in a hail of bullets after being shot dead outside his family home.