Luke D'Wit tricked his millionaire neighbors, Stephen and Carol Baxter, into thinking he was a harmless ‘I.T. geek', before poisoning them so he could take over their business. The story of how his harrowing 999 call helped police bring him to justice.

Pharmacist Mitesh Patel strangled his wife in order to claim insurance and start a new life with his lover. After ransacking their home to make it look like a burglary gone wrong, he made a tearful 999 call, unknowingly leaving clues as he spoke.