MURRYSVILLE, Pa. – A 16-year-old boy with a "blank expression" stabbed and slashed 19 students and a police officer in the crowded halls of his suburban Pittsburgh high school Wednesday before ...

Have you ever listened to someone who had a blank expression? When their words said one thing, but their expression didn’t correlate with the sentiment? Perhaps they gave you a compliment ...

A 16-year-old US boy with a ''blank expression'' stabbed and slashed 21 students and a security guard in the crowded halls of his suburban Pittsburgh high school before an assistant principal ...