A man has been arrested in connection with the murder of a 24-year-old mother nearly five years ago.
Police still want to trace Ms Nyeko's last movements
Jacqueline Nyeko's badly beaten body was found in a storage area on the Ethelred Estate, south-east London, in January 2002.
A £10,000 reward has been offered by police to help solve her murder.
A 27-year-old man was detained in Kennington, south-east London, as he left his home and taken to a south London police station for questioning.
A post-mortem found Ms Nyeko, a Ugandan national, died from head injuries.
Det Insp Stewart Kingston said Ms Nyeko's death had devastated her family.
"In order for them to move forward they need to know what happened to her," he said.
"As well as being a young woman with her whole life ahead of her, Jacqueline was the mother of a small child."