I really feel for those who have lost relatives in the shooting. We thought this had gone away following Hungerford and Dunblane, and now is not the time for the knee-jerk reactions in political terms that followed them.
Thankfully such incidents are rare, but whatever the result of this, clearly even more control on guns hasn't worked following the last two massacres and I doubt would work again. Trying to stop loners having guns? Seems to be an appropriate thing to do, but not exactly easy either.