[BitWielder1]

19 years old, too young to buy a gun.
Mental problems, known troublemaker.
Gun free zone.
Eventually stopped and apprehended by armed men.

How exactly would additional gun laws help?

[21twelve]

It is probably 18 years-old limit to by a rifle or shotgun in Florida. It is too bad that the school didn’t prosecute him for making terroristic threats - then that would have been in the record. Instead they tell him he can’t bring a back-pack to school. Or his neighbors go after him for shooting at their chickens.

[ridesthemiles]

He bought it legally——age 18 in Florida, and most other states.