The unexpected death of any young person is a tragedy. But when the circumstances of a young person’s unexplained disappearance and subsequent death are unsolved mysteries, grief grows exponentially. That is the experience of the families of Paul Kochu and Dakota James, two promising young men who mysteriously disappeared from Pittsburgh on winter nights separated by 25 months. The vexing questions of their cases continue to bedevil those who loved them and even strangers moved by the tragedies.