years. david's bones had been recovered from a construction site just a year after he vanished. but how? and why did his body end up there? turns out that location had significance to someone, a woman, who was about to make some alarming claims about the young dad. once again, here's keith morrison. >> it was good detective work that identified david jackson's earthly remains. what was left of them, but pure chance that the partial skeleton was found at all, as david's brother, mark, found out. >> they were getting ready to build a walmart and a construction worker came across some bones. reported it, they went out and dug up a bunch of bones. and they sat in a morgue for 15 years. >> sat there all those years, even as those who loved david held out a shred of hope that he was alive, somewhere. >> as far as i know, he was disappeared. he was missing. >> but now detective velasquez had a hard truth to tell. david jackson was dead. not missing. and the way he had been hidden made it perfectly clear he had been murdered all those years ago. most likely before his friends or family even noticed he was gone. which have put a final period on his mother's lingering hope for his return. and apparently an ex-wife's what ifs. were you seriously thinking, you know, maybe some day i'll get back together with him? >> when it's your first love, you're always think, you know, wow, you know, could it work? what if? >> strange how things turn out. barbara had moved back to