The disappearance of Colorado lawyer Royal "Scoop" Daniel III.
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An NBA star and his girlfriend vanish while sailing in the South Pacific, and suspicion falls on the athlete's brother.
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Detailing the last day Chicago bluesman John Spira was seen before he vanished on Feb. 23, 2007.
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A real-estate agent from the Tampa Bay area vanishes and investigators question her husband. Nine years later, her husband's girlfriend helps solve the case.
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Atheism advocate Madalyn Murray O'Hair and two members of her family vanished along with a substantial amount of money in 1995.
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A college student leaves her son with a close friend and vanishes. Her abandoned car is found a week later and a warrant for her arrest is issued.
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The case of Billy Smolinski, who vanished from Waterbury, Conn., after learning that his girlfriend was cheating on him.
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The case of Maura Murray, who disappeared in February 2004 following a one-car accident in New Hampshire.
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The disappearance of 18-year-old Lee Cutler in 2007, who vanished after leaving for work.
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The case of Michele Whitaker, who was last spotted at a truck stop before disappearing in 2002.
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The murder of Amy St. Laurent, who was last seen at a bar in Portland, Maine.
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A mother of three vanishes, and the probe uncovers her stint as an adult escort and her two previous marriages.
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