things buried in the ground in the past, or both. it was july 2003, beaches quiet, snowbirds back up north. so no one noticed at first what was starting inland, a little, in a town called pembroke pines, where donna velasquez, just three months a detective, a rookie, really, had just been assigned to a brand-new cold case unit. >> the sergeant came into the office and dropped a box of papers right on my desk and said, here, see what you can do with this. and i began to wonder, mm, is this a test to see, can she really do this? >> that the case was a challenge was an understatement. a now all-but-forgotten mystery, a disappearance 15 years earlier of a young man named david jackson. and the file offered no hints, no pointers, nothing, really, beyond the basic bio. to unearth the truth, even the