Ahmed Al Azzam, 25, died in hospital three days after he was found seriously injured in his parked car following the shooting at Greenacre, in Sydney's southwest, on July 23.
Two other people, a 22-year-old man and a 19-year-old woman, were wounded in a separate car parked about 50m away, with the man sustaining life-altering spinal injuries.
A 24-year-old man was arrested on Tuesday evening as he arrived at Sydney Airport on an international flight.
He was charged on an outstanding warrant for the offence of being an accessory after the fact to murder, as well as participating in a criminal group.
He is the seventh person to be charged over the shooting, which police believe was linked to the Haouchar crime gang.Â
Investigators alleged the perpetrators of the shooting wrongly thought the occupants of the vehicles were members of rival gang, the Comancheros, who were planning a kidnap attempt.
The man was refused bail overnight and is due to appear in Downing Centre Local Court on Wednesday.
Police are still looking for the alleged gunman, 22-year-old Anthony Pele, who investigators say fled overseas soon after shooting all three victims.
An arrest warrant was issued for Pele's arrest late last year with investigators urging him to return to Australia and face the consequences of his actions.
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