The highest murder rates are mostly in the states that still allow corporal punishment in schools; and they also have higher problems with bullying domestic violence etc. Income and education is worse in these states.
IF YOU THINK THE WAY TO HANDLE SCHOOL SHOOTINGS IS TO WAIT UNTIL THE LAST MINUTE AND SHOOT THEM BEFORE THEY SHOOT YOU; INSTEAD OF IMPROVING EDUCATION AND PREVENTING CHILD ABUSE AND BULLYING FROM ESCALATING TO MORE VIOLENCE YOU'VE ALREADY FAILED!