and what muhammad was asking him to do was to kill over and over and over again. >> lee boyd malvo. >yes, sir. >> two years after the shooting, lee boyd malvo was convicted on two counts of capital murder. he was sentenced to life in prison without the possibility of parole. three years later, he wrote from his cell, i'm still grappling with shame, guilt, remorse and my own healing, if that will ever be possible. as for john allen muhammad, he, too, was convicted of capital murder. the sentence, death by lethal injection. his own motive for the killing spree remains a mystery. >> all we know about muhammad's approach to the shootings is largely what other people have theorized, because muhammad never really explained why it happened. there are theories that he was randomly shooting people in that area so that perhaps he could kill his ex-wife and then swoop in as the grieving ex-husband and take the children away and disappear. if he wanted to kill her, he could have killed her randomly, so i don't think that had anything to do with it. >> i was fearful for my life, but i never ever t