Second man held over Denis Donaldson murder probe released without charge

A second man arrested as part of investigations into the murder of MI5 agent Denis Donaldson has been released without charge.

Donaldson, a 55-year-old senior Sinn Féin official and close colleague of Gerry Adams, was shot dead at a remote cottage near Glenties, Co Donegal, in 2006 after being exposed as a British spy.