Article In New York Daily News on Adam Lanza,
People with Asperger's rarely harm others, so don't be so quick to link Adam Lanza's actions with syndrome: expert - NY Daily News
There is a big difference between being evil and mentally ill.
In a perfect world, I believe that people who are a danger to themselves and society be put in a safe situation before something bad happens. Everyone who is alarmed by someone that might be violent should report their odd behavior as a safeguard to avoid these tragic events.
I believe another article said the mother was a gun affecianado and his access to guns was something that added to a lethal mix. I am not a gun advocate and I think access to semi automatic weapons should not be available to the general public. From what I'm reading, one of his weapons was something that you would carry in a military war type situation.
__________________
"It doesn't cost "nuttin", to be nice". 
MOM
I just want to do the right thing! Uncle Joe, (my hero).