NEW YORK (CNN)
-- Every weekend for more than four years, Fred Murray has walked the road where his daughter, Maura, vanished. Family, friends and volunteers help him look in the woods and mountains near Haverhill, New Hampshire, for clues to what happened to her.
Maura Murray and William Rausch were college sweethearts and had just gotten engaged.
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Maura Murray, a 21-year-old nursing student at the University of Massachusetts at Amherst, disappeared on a cold and snowy night in February 2004. She was last known to be driving from Massachusetts through New Hampshire. It is still unclear where she was heading in her black 1996 Saturn.
The car was found abandoned, its front end crashed against a tree. It apparently had skidded off a road at a sharp curve.
Shortly after the accident, a passing bus driver stopped and asked Murray if she needed help. She said no.
Ten minutes later, police arrived. Inside the crumpled Saturn, they found some of Murray's belongings -- school books, running gear, snack foods and alcohol -- police won't say what kind. But Murray was gone
, along with her car keys and a backpack she always carried.