Regardless of which side of the gun control debate we're on, we can agree on one thing: at the root of mass shootings is either mental illness, abuse, or both.

"[Attorney Jim] Lewis said Cruz was a loner and 'a little quirky,' and the family hosting him knew there had been some disciplinary problems and fights, but Cruz had never expressed any discontent toward his former teachers or classmates. 'He was a smaller kid and (there's) some indication there might have been some bullying going on....' the lawyer said."
— Eliott C. McLaughlin and Madison Park, CNN