When emotion trumps logic.

Population of Connecticut: About 3,600,000. 

Number of people who kill their parent, steal a firearm, take it to a place where firearms aren't allowed and everyone is defenseless (a law that was stupidly passed to prevent this EXACT occurrence), and shoot 26 defenseless women and children: 1.

Solution: Disarm 3,599,999 citizens.

Likelihood that such an action will prevent a recurrence: ZERO.