The media has been attempting investigate "every orifice" of the Littleton campus except for the one that spawned the carnage from Hell.....ie. the campus/district administration.
Murders are common occurance in some places...and not in others....
Over the past quarter century it has been my unpleasant experience to be associated with a educational site associated with multiple murders/suicides. In EVERY instance the "enfranchisement of children" and the "undermining of parenti locus (sic)" have directly created the environment which fostered the carnage.
Look to the administration which permited the situation to develop.
While it "could happen anywhere..." the reality is that IT DOESN"T and there are certain policies which encourage growth and revitalization and there are others which foster mold and decay.
Something was ROTTEN on that campus a long time before the incident....and the rot began at the administrative TOP!!