Imagine the heartache when a loved one suddenly disappears but investigators can't figure out what happened, or even if there had been a crime at all? And what about deaths that authorities have dismissed as accidents but the families are sure were calculated killings? “48 Hours" Correspondents Erin Moriarty and Peter Van Sant report.

This classic "48 Hours" episode last aired on 9/6/2001. Watch all-new episodes of “48 Hours” on Saturdays, and stream on demand on Paramount+.

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