Police investigating the murder of Karen Buckley are keen to trace a potential witness captured on CCTV.
The young woman was seen near to the nightclub in Glasgow where Miss Buckley spent the evening before she disappeared and officers believe she may have useful information.
A major police search was launched when the 24-year-old student was reported missing by her friends on Sunday, April 12 after she failed to return from a night out in Glasgow's west end.
Her body was found at High Craigton Farm on the north-western outskirts of the city following a four-day search.
Alexander Pacteau (21) has appeared in court charged with her murder.
The young woman whom police are keen to trace was seen at about 12.30am on April 12 on Dumbarton Road near to Gallus Pub and Sanctuary nightclub.
She walked along Church Street and then got into a taxi on Byres Road, which drove off towards Great Western Road.
The woman is described as between 18 and 25 with long brown straight hair.
She was wearing a short pink-coloured dress and a fur jacket, and was carrying a large brown shoulder bag. Detective Superintendent Jim Kerr said: "Our extensive review of CCTV has identified this young lady near to the Sanctuary nightclub and the footage indicates that she may have information that could assist with our investigation.
"I must stress that she is in no way connected with the death of Karen but she may have information that could assist with the investigation.
"I would appeal directly to the woman or anyone that recognises her from the image to get in touch with the incident room on 0141 532 5443.
"I can assure you that the public's trust is of paramount importance to Police Scotland and all information passed to us will be treated in the utmost confidence."
Pacteau is also accused of attempting to defeat the ends of justice.
He made no plea or declaration when he made his second appearance at Glasgow Sheriff Court in April and was remanded in custody.
Miss Buckley, a qualified nurse, moved to Scotland in February and was studying occupational therapy at Glasgow Caledonian University.
Her case touched many people here and in Scotland, with a number of memorial services held in her honour.
Hundreds of people attended her funeral service, which was held on April 28 in the Church of St Michael the Archangel, in her native Mourneabbey, near Mallow, Co Cork.