A mobile phone was stolen from a woman outside a shop on Lincoln High Street, prompting police to issue a CCTV appeal.
A woman in her 40s briefly placed the mobile phone on the concrete slabs outside The Works and House of Fraser at around 11.45am on September 2.
It was then picked up and taken away by someone else.
Police released a CCTV appeal on Friday, October 25 of a woman who they believe can assist with inquiries into the theft.
They did not specify if the woman pictured was a suspect or a witness.
Anyone with information, or who recognises the woman, should contact Lincolnshire Police on 101, or via email at [email protected], quoting reference 296 of September 2.
It can also be reported through the independent charity Crimestoppers anonymously on 0800 555 111 or online here.