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Freddie Scappaticci, codenamed Stakeknife, spent decades as a senior member of the IRA's Internal Security Unit while secretly working for British military intelligence. When his identity was exposed in 2003, it sparked one of the most controversial intelligence operations of the Troubles.

Freddie Scappaticci, the highest-ranking informant ever placed inside the Provisional IRA, spent 25 years feeding intelligence to British military handlers while simultaneously running the organization's execution unit. His death in March 2023 reopened questions about how many lives were lost to protect his cover.

On 28 April 1998, Arlene Fraser disappeared from her home in Elgin, Scotland, after dropping her children at school. Three years later, her husband Nat Fraser was convicted of her murder at Edinburgh High Court, despite no body ever being recovered.

Arlene Fraser, 33, vanished from her home in Elgin, Scotland on 28 April 1998 after waving her children off to school. Despite extensive searches and a £20,000 reward, no trace of her body was ever discovered. Her husband, Nat Fraser, was convicted of her murder in 2012.