How did Montana teen Danni Houchins die? Her family's decades-long search for the truth

It was the end of September 1996, a Saturday night in a fishing area just outside of Bozeman, Montana -- a place of tranquility until this night.

A few miles up a rural highway, near the small town of Belgrade, searchers discovered the body of 15-year-old Danielle "Danni" Houchins.

Peter Van Sant: What brought your sister Danni down to this area back on September 21st, 1996?