Police investigating the murder of Paul McCauley in 2006 in Londonderry have arrested a 25-year-old man in the city.
The 28-year-old has been taken to a police station in Belfast for questioning.
He is the 13th person to be arrested in the investigation. One man has been charged with murder and another reported to the Public Prosecution Service.
Detective Chief Inspector Michael Harvey, said police enquiries into Paul’s murder were active and ongoing and he appealed to those with information to come forward.