happen here because it happened to my husband. >> reporter: there's no proof that the joyals are right, but paul'shave never been caught. and elizabeth joyal admits at first she was angry when he agreed to be interviewed again for this program. >> i said what are you thinking? why do you want to bring notice once again? but then when the man in russia was shot i had kind of an epipha epiphany. i was like wait a minute, someone needs to talk about this, someone needs to say this is not right. >> can i ask you an obvious question? why are you still doing this? why are you talking to me now against -- >> against the advice of counsel and my family. well, it may be foolish but i think it's the right thing to do. >> that's all for this edition of "dateline." i'm natalie morales. thanks for watching. >>> my parents always told me that monsters don't exist. i can tell you with absolute certainty that is 110% false. he is a monster. >> reporter: a wife and mother killed in her own home. >> i get a phone call from a screaming, irrational voice on the other end. i said, is it rachel? >> i said, what do you