A Milwaukee, Wisconsin, detective had an unconventional idea of how to help solve the murder of 19-year-old college student Sade Robinson.   It all began in April 2024, when the charred remains of Robinson's car were found behind an abandoned building in Milwaukee. At the time, first responders weren't immediately alarmed for her safety.      "An abandoned car ... on fire doesn't necessarily mean that the driver's in danger?" asked correspondent Anne-Marie Green in "Sade Robinson and The Secret