This is an excellent article by Andrew Solomon of the New Yorker.  I seldom read the New Yorker as I find it as pretentious and overly intellectual.  This is different.

http://www.newyorker.com/reporting/2014/03/17/140317fa_fact_solomon?currentPage=1

     In his conversation with Adam Lanza's father Peter, guns, gun laws, and gun control are NEVER blamed.  What we do see is a horribly misdiagnosed boy with a hyper-protective mother who, rest her soul, as her son descended further and further into darkness descended further and further into denial.