Police are appealing for witnesses to a serious collision in Ifield Avenue, Crawley.
A BMW travelling east last Thursday (February 9) at 11.20am collided head on with a Honda Jazz car travelling west.
The driver of the BMW, a 26-year-old man left the scene initially but later returned and was arrested on suspicion of drug-driving. He has been released on bail until March 10 pending further enquiries.
The driver of the Honda Jazz, a 78-year-old man was taken to hospital with serious injuries. Sadly he died in hospital on Monday (February 13).
Anyone who saw the collision, or the BMW being driven prior to the collision, or anyone with relevant dashcam or CCTV footage of the incident is asked to contact police by emailing collision.appeal@sussex.police.uk quoting Operation Earwig.