POLICE believe they know who shot dead a young man in Sydney's west. They are hunting the gunman who shot Joshua George in the chest on Sunday after a heated row a day earlier.
Detective Chief Inspector Mark Brett, the Macquarie Fields crime manager, said there had been an argument between Mr George and friends on Saturday and an arrangement to meet up on Sunday.
Emergency services were called to Gidley Crescent, Claymore, about 1.30pm on Sunday where they found Mr George with gunshot wounds.
''We believe [the argument] had some bearing on this incident today,'' Inspector Brett said. ''We are seeking assistance from two males and a female seen with the victim beforehand.''
Inspector Brett said Mr George was known to police.
A nearby resident, Mary-Anne, told Fairfax Media she performed CPR on Mr George.
''We came out when we heard a gunshot and a woman screaming,'' she said.
Police said Mr George was taken to Campbelltown Hospital where he was pronounced dead.
Specialist officers are at the scene, where they are expected to stay for some time, police said.