All good points.
I was thinking the lack of responsibility of the mother
of the CT shooter allowing her son access (or failure to prevent access)
of her firearms.
But you are correct, a trigger lock would do the same thing.
“A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.” ~George Washington
US Coast Guard 76-86 Semper Paratus