Marc Williams death: Reward to find hit-and-run driver
A reward of £1,000 is being offered to catch the driver who hit and killed a young man on a slip road in Berkshire.
Marc Williams, 22, died on 1 December last year after he was found lying on the A404M slip road at Cox Green.
Police believe he was hit by a car which failed to stop between about 02:15 and 02:30 GMT.
Crimestoppers is now offering the reward to anyone who provides information leading to the driver involved being arrested and charged.
Sgt Beth Walton, of Thames Valley Police, said: "We are nine months into the investigation and as yet we have been unable to identify the vehicle and driver involved in this collision.
"There was a good response from the public around the time of the collision and all witnesses who came forward at that time have been spoken to.
'Longing for answers'
"We believe that someone will know the person who was involved in this, either having been present in the vehicle as a passenger at the time, or having gained such knowledge following the collision."
She added: "Marc's parents have been left devastated by his death and are desperately longing for answers.
"They are unable to find any peace of mind until they know how and why their son died."
Mark Williams and Joanne Parker have previously appealed directly to the driver to come forward.
Mr Williams, who worked as an epilepsy support worker, had been in Maidenhead to see a friend's band on the night he died.
After leaving a pub in the town centre at 01:00 GMT, he was last seen on CCTV passing a taxi rank at the railway station shortly after.
He was found by passers-by and died from his injuries en-route to hospital.