Melanie Hall had been on a night out at Cadillacs nightclub in Bath
Pictures of clothes similar to those worn by murder victim Melanie Hall have been released six months after her remains were found beside the M5.
Miss Hall, 25, disappeared after a night out in Bath on 9 June, 1996.
Her remains were found in October last year near junction 14 of the M5 in South Gloucestershire, by a workman clearing vegetation.
Det Supt Mike Courtiour said he wanted to know what happened to Miss Hall's clothing and belongings.
Det Supt Courtiour, who is leading the case, said on the evening she was last seen, Miss Hall had been wearing a distinctive blue-silk dress with a round neck, and black suede mule shoes with straps across the front and an open toe, thought to be size 5 or 6.
Miss Hall was wearing black suede mule shoes with straps across the front
She also had a creamy-coloured, single-breasted, long-sleeved and hip-length jacket, and was carrying a black satchel-type handbag.
"The only item of jewellery found was the ring on her finger that helped us identify her remains," he said.
"What I want to know now is what happened to all her clothing? What happened to her bag and possessions and what happened to her watch and jewellery?
"I am sure somebody must know what happened to her and where all those items went.
"I know it has been a significant length of time since she went missing, but I believe there are people who do know what has happened and are remaining silent."
Miss Hall was carrying a a black satchel-type handbag
Psychology graduate Miss Hall, of Bradford on Avon, worked as a clerical officer in the orthopaedic department at the Royal United Hospital in Bath.
She had been on a night out with friends and her boyfriend of three weeks, Dr Philip Karlbaum, at Cadillacs nightclub in Walcot Street.
Miss Hall was last seen sitting on a stool near the dance floor soon after 0100 GMT.
Det Supt Courtiour said: "Two hundred and fifty additional statements have been taken and 1,200 new tasks and investigative actions have been completed.
"The forensic work has been extensive and is still continuing today."
In December, hundreds of mourners attended Miss Hall's funeral at Bath Abbey, after her parents Steve and Pat Hall decided to open the service to the public.