Ciaran McKenna from Armagh died in the collision
Gardaí investigating a fatal traffic collision in Monaghan have arrested a woman in her 20s.
The crash happened on July 30th, 2012 at Magherakill in Castleblaney.
Ciaran McKenna from Crossmaglen in Armagh died as a result.
The woman was detained at Dublin Airport on Wednesday morning.
She has been charged to appear at Carrickmacross District Court later today.