The investigation into why a Nashville high school student fatally shot a classmate before killing himself has centered on his online writings, which authorities describe as concerning warning signs.

A Klein Oak High School student has been expelled and charged after they were found with a gun, according to the school's principal.

One of the 12-year-olds threatened to shoot four of his classmates, the other posted a threat on Instagram and an 11th grader ...

Audrii Cunningham's killer, Don Steven McDougal, didn't have to register as a sex offender despite a violent history that included child molestation.