Originally Posted by TimFreeh

All true, this law might have prevented it from happening, it might have altered the plan a bit or it might have made no difference at all. It's pure speculation to say how a specific law definitively would have effected this particular case.

What is not speculative is how such a law would effect current law abiding citizens.

Many would have to purchase guns safes and make arrangements for buying, transporting and installing them. A measurable percentage of people forced to comply would live alone or in households that didn't contain mentally unstable people and for those people this law would be a total waste of resources and it could create anger and resentment. Current gun owners would also face the difficult question of what to do about the conflict between the primary reason they own guns and compliance with the new law. If someone breaks into your house and intends to do harm you can't really tell them to wait while you go to the safe, open it and retrieve the firearm of your choice. Many people would have to choose between complying with a new law and becoming a criminal by having one loaded firearm out of locked storage.

There are also many gun collectors that have beautiful display cabinetry that showcases rare and unique firearms and people that have guns over their fireplaces - all these would be gone.

I'd sure love to be able to solve this problem with a law but keep in mind that many, many times the side effects of new laws restrict freedoms of people well outside the bounds of the intended target of the law.