A painstaking excavation of an old mine in Australia has resumed as crews search for the remains of a teenager who went missing 23 years ago in an outback town.
Karen Williams, 16, was last seen in Coober Pedy, South Australia, in the early hours of August 4, 1990.
Police, mine rescue and SES workers today began their second day of excavating an old mine on the outskirts of the town after detectives received new information.
Detective Superintendent Des Bray said there were three mine shafts at the site in which Williams' body was likely located.
While nothing was ever certain, police have "every expectation and we genuinely believe this is the most likely place in South Australia that we'll find Karen Williams", he said.
"It's going to be a very, very slow search.
"We've got a shaft which is less than a metre in diameter, somewhere around 35 feet (10.67 metres) deep which we have to excavate by hand, by filling buckets, bringing it to the top on a rope."
Police said Williams had been with friends at the Opal Inn and at Sergio's Restaurant, before she was allegedly dropped off by a young local man in Dawes Street.
Last year a A$200,000 reward was offered for information leading to an arrest in the case.