and over to patricia saunders, clinical psychologist, but i want to get into that a whole lot more in depth in another segment. quickly, it's mostly women who perpetrate these kinds of crime on other women. is it not? >> in terms of baby snatching, yeah. but we know that a third of women killed are killed by their partner. those are more prevalent than the baby-snatching mommy killers. >> but just putting it together, killing your spouse or killing an ex, is one thing, but it takes a whole different psychology to snatch a fetus? >> yeah. if it is a baby snatching, then, it is really rare, but these are women who are obsessed with being pregnant and having their own child. they have little or no conscious and they are psychopathic that way, and they don't see the mother as a separate being, but it is just the baby and nothing else. >> carl whitney, did you know roberto? >> no, i did not. >> oh, so you don't have any ideas of his personality or what may have happened? >> no, i don't. i have never really, and i have seen him in passing a couple of times, but never really met him, no. >>