A coroner has recorded an open verdict on the death of a woman who disappeared from a Bath nightclub in 1996.
Melanie Hall was last seen in a nightclub in Bath in 1996
Hospital worker Melanie Hall was last seen inside Cadillacs nightclub during an evening out with friends.
The 25-year-old's body has never been found, despite one of Bath Police's biggest ever investigations.
Coroner Paul Forrest said circumstances suggested she had been unlawfully killed but a lack of evidence forced him to record an open verdict.
At the inquest, requested by her parents, Steve and Pat Hall of Bradford-on-Avon, Wiltshire, the coroner said there was no explanation for her disappearance but speculated that she was killed soon after she went missing.
New appeal for information
Concluding the inquest at Bath County Court, Mr Forrest said: "On Sunday 9 June 1996, Melanie disappeared.
"Despite extensive police inquiries Melanie has not been seen since and there is no indication that she may still be alive."
Outside the hearing, her father appealed for new information from the public in the hope of moving the case forward.
Speaking about the verdict, he said: "My theory is that she came out of the nightclub with someone she felt happy to go out with, for some reason, and something went terribly wrong. I refuse to speculate on what might have gone wrong."
Ms Hall's disappearance was one of the most high-profile cases of the 1990s.
A £10,000 reward was offered and the case featured on a TV appeal.
Avon and Somerset Police said they had received more than 1,000 messages from the public about the case.