I've got all these babies and it's just very hard. This guy's a monster.

A baby sitter is someone you are supposed to trust. In my opinion this is the worst kind of betrayal one person can inflict on another.

If he does have it, he put these children at risk. Think about the fear he has inflicted in these parents. Not only in the inhumanity (of the crimes), but also with this disease.

To know you've got that disease and not even care, and it's just a total betrayal to all of the children and their families.

Yes, it does. With what he's done to her, absolutely it does.

Neuroscience is now a very important research area in biology. We are now understanding a lot more about brains in babies, as well as children and adults.