The hunt continues for a suspected gunman following the fatal crossfire shooting of a man during a domestic argument that spilled onto the street in Sydney's south-west.

Two people have been charged but police continue their hunt for shooting suspect Matthew Russell, whose car was found without number plates in the garage of a Green Valley home that was raided by police on Saturday night.

Police are searching for Matthew Russell. (Supplied: NSW Police)

Qusay Al Mhanawi was shot dead outside his home.

Police charged a 30-year-old man and 20-year-old woman with concealing a serious indictable offence.

The man and woman mocked a 9NEWS camera crew outside the police station, with the male raising his hand in the shape of a gun shouting "bang, bang."

A 30-year old man charged with concealing a serious indictable offence gestures to a 9NEWS crew. (9NEWS)

A 20-year old woman charged with concealing a serious indictable offence. (9NEWS)

Mr Russell, 28, is wanted for questioning over Friday night's shooting of a 46-year-old man, who was struck while talking on his mobile phone in a parked car on Matthew Street about 6.30pm.

The victim, an Iraq-born father Qusay Al Mhanawi, was an innocent bystander caught up in a dispute between Mr Russell and two brothers over one of the brothers' girlfriends, police allege.

Mr Russell is known to police and investigators have urged anyone who sees him not to approach him but to contact police immediately.

The man is due to appear in Liverpool Local Court on Monday and the woman is expected to appear in the same court on Thursday after she was granted conditional bail.