Andrew Allen was shot dead at his home in Buncrana in 2012
Gardaí investigating the five year old murder of a man in Donegal have arrested a man in his 50's.
Andrew Allen was shot at his home in Links View Park, Buncrana on the 9th of February 2012.
The man was arrested last night in the County Donegal area.
He is currently being detained at Letterkenny Garda Station.