http://www.eurekalert.org/pub_releases/2009-08/kcl-bdi080409.php

"Professor Declan Murphy and colleagues Dr Michael Craig and Dr Marco Catani from the Institute of Psychiatry at King's College London have found differences in the brain which may provide a biological explanation for psychopathy."

Potential scientific insight into understanding morality. That is, in this particular case, an absence of morality can be associated with a brain that is wired differently.

Of course,
1) This is one study and it could be wrong, and
2) even if it's right, it doesn't address how to fix things.

Still, you have to start somewhere - and most scientists start out by trying to understand the problem.