Former British spy in IRA who allegedly admitted murder will not be prosecuted

Exclusive: Ex-double agent allegedly admitted to murder during training presentations to members of the security services

Victims' families have reacted with anger after it emerged that a former British double agent in the IRA who allegedly admitted to murder while giving training presentations to members of the security services will not be prosecuted.

The case had emerged during an investigation by officers into the activities of the British spy known as Stakeknife and a criminal file was passed to the prosecution service of Northern Ireland.