Re. JonLaw's reaction this floated around here a while back: http://www.nytimes.com/2012/05/13/magazine/can-you-call-a-9-year-old-a-psychopath.html

The truly heart wrenching part of the article for me was the father, the fact that he was the same as a child, and the hope that somehow their kid would also snap out of it eventually.

Although it seems to relate more to the "I am Adam Lanza's mother" article than to anything that has been reported about Lanza himself.