The Susan Powell Case

This undated photo provided by Chuck and Judy Cox shows them with their grandsons, Charlie, left, and Braden, right. Charlie and Braden were killed along with their father, Josh Powell, on Sunday in what police said was an intentional fire set by Powell. The Coxes are the parents of Powell's wife, Susan, who has been missing since 2009. (Courtesy Chuck and Judy Cox/AP Photo)