Lee Boyd Malvo, who was convicted along with John Allen Muhammad in the 2002 D.C. sniper shootings that left 10 dead and three wounded, says he remembers the killings vividly but can't explain why he did what he did. "I was a monster," Malvo told the Washington Post in a recent interview from a Virginia prison where he's serving six consecutive life sentences without the possibility of parole. "If you look up the definition, that's what a monster is. I was a ghoul. I was a thief. I stole people's lives. I did someone else's bidding just because they said...