text: A second teacher , David Kachadourian , was shot in the back of his shoulder while in a hallway evacuating his students to safety .
simplified: Another teacher `` David Kachadourian '' , was shot in the shoulder while evacuating his students to safety and A 14-year old student , `` Trinnetta McGrady '' , had knee and back injuries received from being trampled in a hallway by fleeing students .