Brett Kebble's killers shot at him seven times on a deserted stretch of Melrose Street in northern Johannesburg in September last year.
The mining magnate was hit in the chest while driving his luxury silver Mercedes-Benz S 600. He was alive for a few moments but after driving for 400m he lost control, swerved across the road and smashed into the bridge railing over the M1 highway. That was where police found the 41-year-old tycoon's body at 9.30pm.
Kebble had been on his way to a dinner engagement.
Kebble's killer or killers shot at him through the driver's window.
It appeared to have been a professional hit.
"We don't know if he was led into an ambush or if he was followed," police spokesman Superintendent Chris Wilken said at the time.
Shortly after midnight Kebble's body was still inside the car on the road.
The tyre marks left by Kebble's car show he was accelerating away from the killers or that he had been forced to brake abruptly.
The killing is to date still shrouded in mystery. Spent cartridges were found lying in a row along the skid mark at short, regular intervals.
As Kebble's body was loaded into the mortuary van police were carrying out investigations to try and piece together the sequence of events.
A policeman had isolated 10 pieces of evidence with orange cones. Under six of them lay spent 9mm cartridges.
The window on the driver's side of Kebble's car was rolled down when the shooting took place.
These were signs that he could have stopped to meet someone but had driven into a trap, an investigator at the scene said.
Where Kebble was shot is a narrow stretch of road lit by one lamppost. A witness who arrived on the scene before the police found the blood-splattered body slumped over the steering wheel.
"There was blood everywhere. Someone wanted him dead. The car was riddled with bullet holes," said the witness.
But the questions remain.