A Georgia jury on Tuesday took the rare action of holding a father criminally responsible for the actions of his son who — while armed with an AR-15-style rife kept inside their home — allegedly gunne...

A man has been convicted of murder and manslaughter after giving a semiautomatic, assault-style rifle to his teenage son, who is accused of using it to kill two high students and two teachers.

Jurors found him guilty on 27 charges, including two counts of murder and two counts of manslaughter.