Russell Goreraza knocked down and killed an unidentified man in his car and has been fined $800 (£520).
The eldest son of Zimbabwe's first lady Grace Mugabe has been convicted of manslaughter and fined $800 (£520).
Russell Goreraza knocked down and killed an unidentified man in his car in the capital, Harare, in February.
"I regret and want to apologise for the incident," President Robert Mugabe's 31-year-old stepson told the court.
According to reports by BBC, the magistrate said he had considered cancelling the accused's licence and sending him to jail but opted for a fine because of his remorse.
The BBC's Brian Hungwe in the capital, Harare, says the name of the person run over by Goreraza was not revealed in court.