Valentines Day Mini-sode: The Lonely Hearts killers

He promised love, devotion, and a future built on companionship. Women believed him—because he knew exactly what to say. But behind the letters and lies stood Martha Beck, whose jealousy and desperation would turn deadly. Together, Raymond Fernandez and Martha Beck used romance as a trap, leaving devastation in their wake. This is their story, on Cold Blooded Serial.