The amateur sleuth who searched for a body - and found one

On a blazing hot day in late July, Lissa Yellowbird-Chase drove her black SUV, license plate "SEARCH", to a muddy landing on Lake Sakakawea. It was a remote entrance to the water on the northern edge of the Fort Berthold Reservation in North Dakota - not much more than a rickety dock at the end of an uneven gravel road.

Hitched to the back of Yellowbird-Chase's truck was a 14-foot boat with a half-broken motor and a set of fishing sonar. By her own admission, she was not a particularly skilled or experienced boater, nor an expert in sonar. But she had a plan.

Along with a couple of volunteers from her group, the Sahnish Scouts of North Dakota, they would motor along the shoreline of the bay, scanning the lakebed for anomalies, moving further and further away from the shore with each pass. They would keep going until Yellowbird-Chase satisfied the nagging feeling she'd had about this spot for months.