Crimestoppers has launched an appeal for information in relation to a murder in Buncrana, Co Donegal, more than three years ago.
24-year-old Andrew Allen was shot dead at his home in Links View Park, Lisfannon, on February 9, 2012.
Mr Allen was killed after gunmen fired shots through the windows of his rented house.
The group Republican Action Against Drugs claimed responsibility for the killing.
Gardaí say they believe there were a large number of individuals involved on the night of Andrew's murder, and that some of those people did not intend for the events that unfolded to lead to his death.
They are appealing for anyone involved on the night, or anyone with information, to contact Crimestoppers, which runs an anonymous service.