Major Collision Investigation Unit detectives are investigating a fatal collision following a pursuit in Mt Eliza on 14 April.
Police attempted to intercept a silver Commodore sedan alleged to have been involved in serious offences.
The vehicle failed to stop on Nepean Highway near Mount Eliza Way about 8.20pm.
A short pursuit was initiated.
At the time of the incident a civilian vehicle and a police car collided on Nepean Highway near Humphries Road.
Four occupants of the vehicle were taken to hospital and the police officer was not injured.
One of the occupants of the vehicle, a 79-year-old Mt Eliza man, has subsequently died in hospital today.
Police media have stated “As the incident is currently being investigated with oversight by Professional Standards Command, IBAC and the coroner, it would be inappropriate to comment further at this stage”.