Police are appealing for witnesses to a fatal hit and run collision near Henfield in the early hours of Saturday (29 May).
A black Vauxhall Insignia car was travelling southbound on the A2037 Shoreham Road between Henfield and Small Dole when it lost control and hit a tree at 12.17am. The passenger, a man, sadly died at the scene. The driver made off from the scene.
Police have arrested four people in connection with the collision including a 22-year-old woman and a man aged 20 who were both detained on suspicion of causing death by dangerous driving and failing to stop. A 26-year-old woman was detained on suspicion of perverting the course of justice and a man aged 49 was arrested on suspicion of assisting an offender. They remain in custody.
The road was closed for nine hours for investigation and recovery work to take place but has now re-opened.
Detective Sergeant Rob Baldwin said: "We would like to hear from anyone who saw the Vauxhall Insignia travelling southbound prior to the collision or the incident itself or if anyone has dashcam or CCTV footage of the collision to come forward."
Anyone who can help the investigation is asked to email email@example.com quoting Operation Pitstone.