Spirit Island, the largest freshwater island in the world, is aptly named.
Since the late 1800s it has had more than its share of unexplained events and unsolved disappearances.
For decades, locals explained the happenings as a consequence of a vast area, sparsely populated with minimal law enforcement.
Marie Baxter and her twin brother Andrew didn't buy it; they believed no one invested the time required to find out what really happened.
Their...