marshal's investigation into cause. there would be a probe into the deepest roots of a treachery beyond most people's comprehension. >> that's not true. no way. >> what had they all missed? >> a monster, a liar, a cheater. >> he's destroyed my entire family. >> before it became charred rubble, the house was home to a longtime paducah couple, keith and julie griffith. high school sweethearts, 36 years into a marriage that had produced two sons. the older -- >> they were very supportive parents. they were loving. they loved my kids. >> aaron took after his dad, athletic, easy going, level headed. younger brother zach was more of a firecracker like his mom. in the 6th grade he grabbed a