With Operation Kenova back in the headlines, we look to the story of Frank Hegarty, an IRA member turned British informant whose assassination led to the largest murder investigation in British history.

Dan is joined by Henry Hemming, the bestselling author of Four Shots in the Night. Henry unravels this tale of espionage, murder, and justice, and explains how it fits into the longest-running conflict in recent British history - The Troubles.

Produced by James Hickmann and edited by Dougal Patmore.

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