David Stemler death: Third person arrested over gruesome alleged murder in Canterbury, Sydney's west  - as heavily pregnant accused Rhylee Stig makes bail bid to free her from jail for birth of her baby

A third person is expected to be charged with murder over a gruesome alleged gang killing on the streets of Sydney - as one of the accused, a heavily pregnant woman, makes a bid for bail. 

NSW Police Homicide Squad detectives arrested a man at Silverwater prison on Thursday morning and are preparing to charge the 30-year-old with the alleged murder of Ferenc 'David' Stemler.

Mr Stemler, 28, was allegedly gunned down in Sydney's deadly gang war out the front of his home in Canterbury, in Sydney's west last year.

In gruesome scenes on July 27, Stemler's tattooed body was pictured riddled with bullets lying in the middle of the road, as schoolchildren walked past that morning. 

Strike Force Murrell officers last month charged a 27-year-old man with the murder as well as Rhylee Peta Stig, 23, who was not handcuffed on her arrest due to her condition.

Ms Stig, who is believed to be nearing full-term in her pregnancy, is due to make an application after Easter to be released from prison ahead of the birth of her child. 

The former Hunter Valley schoolgirl, who was arrested at her Wetherill Park home on February 21, was charged with murder and refused police bail. 

She was then again refused bail in Fairfield Local Court when police said she 'has not shown cause why detention is not justified'.

However, Ms Stig is now making an application for release next Tuesday before Justice Mark Ierace in the NSW Supreme Court. 

Detectives say that Mr Stemler was shot dead as he approached a white Commodore Broughton Street in Canterbury between 1.55am and 2am on July 27, 2023.

Police allege that the third accused now in custody was in the Commodore at the time Mr Stemler approached it.

Stemler, who was heavily tattooed, was treated at the crime scene by NSW Ambulance paramedics but died. 

Just days ago, police released CCTV related to the Mr Stemler's death which shows a white Lexus, allegedly stolen in July last year, arriving at a Casula Central carpark about 10.25pm on July 18.  

Police believe the driver of the Lexus allegedly lay in wait for the planned shooting, which was seen being 'checked on' by a black hatchback on July 20 and again by a dark-coloured hatchback on July 24.

It's unclear who police will allege pulled the trigger on Stemler. His death came after he met two men outside his rental home on Broughton St.

Local police, with assistance from State Crime Command's Homicide Squad, commenced inquiries before the matter was taken carriage of by Task Force Magnus under Strike Force Murrell. 

Task Force Magnus was established in July as a policing strategy to target and disrupt gun-related and violent crime, and to investigate links between recent organised criminal activity in Sydney. 

Assistant Commissioner Michael Fitzgerald said the arrests were significant for State Crime Command's Task Force Magnus.

'While the work is never truly done, this is a huge feat for our Command, who were given the difficult job of circuit breaking the brazen violence we saw unfolding on our streets.

'Task Force Magnus supplemented their suite of capabilities with both proactive and reactive teams, to not only target offenders, but prevent more acts of violence on our streets.

'The safety of our wider community has – and always will be – our number one priority, and the people of NSW our motivation for crafting such a significant response; one that has evidently had noteworthy success.'

Investigations under Strike Force Murrell continue.