A 48 year-old man has been arrested in Dungiven as part of an investigation into the murder of James McConnell in the Prehen area of Derry in 2009.
Mr McConnell was shot dead by two masked men at his home in Woodland Avenue, Prehen, on February 11, 2009.
The INLA later claimed responsibility for the shooting.
The 48 year-old who was arrested this morning has been taken to the serious crime suite at Antrim PSNI station for questioning.
He is also being questioned about a shooting incident at Feeney in 2004 when a shotgun was fired at a house.
Detectives are also carrying out two searches in the Dungiven area.