Grant Stevens’ teenage son Charlie sustained a brain injury after allegedly being run down south-east of Adelaide, with a man later charged

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The son of South Australia’s police commissioner has died in hospital after being struck by a car in an alleged hit-and-run incident during schoolies celebrations.

Charlie Stevens, 18, sustained an irreversible brain injury after being run down about 9pm on Friday in Goolwa, about 90km south-east of Adelaide, an emotional SA police deputy commissioner Linda Williams told reporters.