Liechtenstein, which makes its living on bank secrecy, has a warrant out for the informer's arrest.

FORBES: Magazine Article

The Irish Mail on Sunday's front page was dominated by a picture of the body of IRA informer Frank Hegarty and an interview with Mr Hegarty's sisters accusing Mr McGuinness of involvement in luring their loved one to his death - a claim the Sinn Fein politician denies.

BBC: Selective memories of Martin McGuinness and Gusty Spence

For two decades, Mr Donaldson, was a key informer at the heart of Sinn Fein's political machinery.

BBC: Profile: Who was Denis Donaldson?