Two pedestrians who were killed in a 'serious collision' on Saturday evening (5 August) were a father and his young son.
A 48-year-old man and his 11-year-old son were hit on Rue de Fauvic in Grouville at around 9.30pm. The vehicle didn't stop.
All emergency services attended, but both died in hospital from their injuries a short while later.
A 28-year-old man was arrested the following morning on suspicion of causing death by dangerous driving and failing to stop and report an RTC.. He remains in custody.
Officers are now appealing for CCTV or dashcam footage from the Rue de Fauvic area between 9pm and 9.40pm on Saturday.
Anyone with information should call SoJP on 612612 (options 2, then option 4) or Crimestoppers anonymously on 0800 555 111.

Revised Strive hotel plans given the go ahead
South Hill skatepark gets green light
Health and care charities worth £137m to Jersey
'Not finding guilt is a verdict' says Human Rights Group on retrial law
Date set for new vape tax to take effect
Youth Assembly backs vape ban, but narrowly rejects social media ban
Public Health Jersey issues advice following UK meningitis outbreak
Ports of Jersey to takeover running of harbour café