When thieves broke into Tony Martin's remote Norfolk farmhouse, three shots were fired, killing a 16-year-old burglar and wounding his accomplice. Martin was convicted of manslaughter but went on to become an unlikely tabloid hero. Mark Austin looks at the case and investigates how it sparked a national debate on self-defence. Featuring exclusive testimony from Martin, interviews with his family and friends, insights from the professionals involved in the case, and access to police footage.

• Mark Austin