A MAN is expected to be charged over the fatal shooting of a 24-year-old man in broad daylight in Sydney's southwest.
Joshua George died after being shot once to the chest at Claymore about 1.30pm (AEDT) on Sunday.
After the shooting, police began hunting for 21-year-old Graeme Smith who is believed to have gotten into an argument with the 24-year-old at a party near Campbelltown the night before.
Police had previously said they had no idea about Mr Smith's whereabouts.
But about 7.15pm (AEDT) on Thursday, officers attached to the Police Transport Command spotted a 21-year-old man while they were patrolling outside the Blacktown railway station.
The man, who was reported to have a distinctive tattoo on his neck, had a scarf or jumper covering it.
Once the material was removed, it confirmed to officers who the person was, a police spokesman told AAP.
Police said the man was arrested a short time later and taken to Blacktown Police Station, where he is currently assisting police with their inquiries.
Inspector Stephen Oswald from Blacktown Local Area Command said he was arrested without incident.
"The police utilised a number of tactical options but he came along willingly once there was some assistance there from local and Transport Command Police," he told reporters on Thursday night.
However, a woman who was with him was taken into custody after allegedly abusing police and resisting arrest.
He is expected to be charged with murder and is likely to appear in court on Friday.