Detectives searching for missing Sebastian Sailes have launched a fresh appeal.
The 21-year-old was last seen leaving The Black Horse pub in Chippenham town centre at about 11.30pm on Thursday night (27 February) – before walking along nearby Lovers Walk.
He is thought to have headed south on Avon Valley Walk towards his home in Notton, a path which runs alongside the River Avon.
Searches on land and in the water are ongoing, with boat search teams and police divers deployed.
Now detectives urgently want to hear from drivers who may have captured dashcam footage in Avenue La Fleche at the time of his disappearance.
“Officers would urgently like to hear from anyone who was driving along Avenue La Fleche between 11.20pm on Thursday 27th February and 12.30am in the early hours of Friday 28th February”, a spokesperson for Wiltshire Police said.
They added: “He was wearing a beige jacket, light blue jeans and white trainers.
“Sebastian is described as white, around 5ft 10ins tall, slim build, with blond/brown hair with a long fringe.
“He was last seen wearing a grey jumper, blue jeans, a beige fur lined jacket and white Adidas trained with a Velcro strap across the top.
“If you can help, please contact us as a matter of urgency on 101 quoting reference 54250025466.”