You cannot make a diagnosis of mental illness from a photograph, but there's nothing wacky or subtle about this photograph. This is the photo that Adam Lanza took when he attended a state university in Connecticut just a few years ago.
Tell me that this isn't the photo of an individual with problems. Tell me Adam Lanza doesn't look like he belongs in counseling or in a special program for adults with social issues. Tell me he doesn't look nuts. What a freak show.
Whoever let him have guns demonstrated a complete and utter lack of judgment. The real culprit, to me, is his mother. It is Nancy Lanza who is just as much to blame for what happened. You can argue a lot of things in this life, but the complicity of incompetent parents is something I fully believe in when it comes to tragedies like this. Sending this individual out into the world without giving him the help he needed--and denying him the guns he never should have had--is unforgivable.