20/20 on OWN S03E42 - Desperate Dads

The case of Josh Powell, who was suspected in the 2009 disappearance of his wife; and then killed himself and his two sons in 2012. Also: the story of an Arkansas businessman who reportedly fell into the Little Red River during a family vacation in 2008; and resurfaced six months later in South Dakota, where he was using a different name.