The teen was found with a gunshot wound to his chest. NewsWire / Nikki ShortThe teen was found with a gunshot wound to his chest. NewsWire / Nikki Short Credit: News Corp AustraliaAn 18-year-old has been shot twice in the chest in an SUV on a street in Sydney’s southwest. Camera Icon The teen was found in a vehicle on Mimosa St at Greenacre. NewsWire / Nikki Short Credit: News Corp AustraliaPolice believe the driver and potential other passengers left the car after driving from Mimosa St to a nearby street.