How do you heat up a cold case?

Most cold cases ... stay cold. For every one that closes, and makes headlines, dozens or hundreds more are left languishing in files and databases. But sometimes, if you ask the right question, to the right person, after enough time has passed, you learn something new. And one new fact can be enough to unearth a bunch more, if you're lucky enough to find the right one.

So how do you reheat a cold case? Where do you start? What do you do with something new when you find it? What happens if you approach a decades-old murder with the urgency of breaking news?

GUEST: Fil Martino, crime reporter, co-host of Tracking a Killer: The Cold Case Files

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