This is his truck he wrecked the day of the shooting. I suppose he drove himself in his pickup.
He shot his grandma at home. Took off driving. Fucked around and drove his truck into a canal. Walked rest of way to school and went inside.
he did not 'get out of a car' and go into the school.
Holy shit! None of that is even close to what happened!! Did the voices in your head tell you that bullshit?