Police are hunting two men who robbed a young gaelic football enthusiast minutes before he fell to his death from the walls of Londonderry.
Conall Kerrigan, 25, from the nearby village of Claudy, fell from Derry's city walls in the early hours of Sunday August 23 after being separated from friends after a night out.
Police do not believe his death was the result of a crime.
However, as a result of examining CCTV images to track his last movements, detectives believe his wallet was stolen from him as he sat on the walls.
PSNI Detective Inspector Conor McStravick said: " Newly viewed footage has been able to assist us in establishing that Conall was sitting on the walls at around 2.34am.
"We know that a number of people passed Conall. We believe that two of them stole his wallet. It was recovered by police during an extensive search.
"Today we are issuing a new, clearer, image of two men who we believe may be able to help us with our inquiries, in the hope that someone will recognise them. It is not known as this stage if they are local men. It may be they are from elsewhere in Northern Ireland or indeed from across the border."
Mr McStravick urged anyone with information about the identity of the men to come forward.