Why'd He Have A Gun?

This is just sad. A Mass. man, who doctors testify had paranoid schizophrenia, blows a high school friend away with a .223. Why did he have a gun? Why wasn't his family involved enough to know this was going on? Why did he slip through the cracks?

Then here's a case of a bipolar run amok, where the family tried to get their son some kind of treatment and the system failed them with disastrous results for everyone. Nice.