>> and right in the middle of preparations he vanished? it didn't make sense but the days turned into weeks, months, middle. hello and welcome to dateline. years. not a sign of david the police for years, judy lived in the most painful kind of limbo. her son david disappeared without a trace. went on to cases but his mother the case went unsolved, sitting cold for more than a decade never let up. until the rookie detective was she knew david was out there assigned to investigate. somewhere. >> on to america's most wanted digging into david's past, she and then a picture of him in the uncovered a twisted tale of love back and i got a list of all the gone bad and a grizzly family big trucking companies that did all the letters but it was -- it secret. but the detective still needed took me a long time to finish to knowte what motive was at th any letter about him because i heart of this crime. here's keith morrison with didn't want the ending to be buried secrets. like i thought it was. >> it was, she said, a horrible limbo. a little piece of her still >> it's a strange thing. hoping for good news. part of her mourning a loss. the soft soil here in coastal i found a therapist right away. florida. things have a way of coming up. take 20 minutes out of every day things buried in the ground in and scream and cry in the the past. morning or scream and cry at it was july 2003, beaches quite,