Do read it all.
"Yet, except in one case, I found no evidence that the low standard of
practice had actually resulted in a preventable killing, despite the
immense power of the retrospectoscope—the medical instrument that
provides us with wisdom after the event and that sometimes does lead to
improvements in practice that saves lives, though at other times it
provides us only with scapegoats."
Yet:
"A further point: it is unlikely that we will ever have a full medical explanation of events such as the Newtown killings."
However:
"In an article in Le Monde, a professor of sociology at Strasbourg
University, David Le Breton, quotes a German schoolboy who killed 15
people in a school in Winnenden in 2009: “I’m fed up, I’ve had enough of
this meaningless life which is always the same. Everyone ignores me, no
one recognises my potential.”
"This reeks of resentful, narcissistic
grandiosity, the result of an imperative to be an individual at a time
when individuation is more difficult than ever"