A fresh appeal has been issued over the murder of a 24-year-old man nine years ago.
Andrew Allen was killed by a group of individuals at his home at Links View Park, Buncrana, Co Donegal on February 9, 2012.
He was shot in front of his partner at around 9.20pm that evening and pronounced dead at the scene.
A car believed to be involved in the murder was found on fire at Churchbrea, Fahan, which is three miles outside Buncrana, shortly after the shooting.
The group Republican Action Against Drugs (RAAD) claimed it killed Mr Allen, a father of two, because he was a drug dealer - a claim denied by his family.
Officers said they are grateful for all the witnesses that have come forward and made statements but gardai believe that there are still people in both Buncrana and Derry city who have information that may assist with the investigation.
In a statement, gardai said: “Many people have been arrested and questioned over the past nine years and (we) are grateful for all those who have assisted the investigation.
“Together with our counterparts in the Police Service of Northern Ireland we continue to investigate and are currently following several lines of enquiry on both sides of the border.
“Now, with the passage of time, gardai are appealing to anyone with information which may assist this ongoing investigation to make contact with them.”
Officers reiterated that any assistance received may be instrumental in bringing this investigation to a successful conclusion.
Anyone with information can contact the incident room at Buncrana Garda Station 074 93 20540 or the Garda Confidential Line 1800 666 111.
