Whatever thoughts of revenge he may have had, they stayed private. In those days, it was unthinkable for someone to take a gun to school. None of us could even imagine it. As we've sadly learned, it's no longer unthinkable. We shouldn't really be surprised.
Kids are great imitators.
People getting killed in restaurants, at businesses, in homes and on the streets. It was only a matter of time until this plague spread to the schools. There's no sure cure, but after Columbine and now last week's tragedy at Santana High School, we should all think about how we can help prevent future incidents. Make sure you can talk to your kids about their problems and fears. Know what they're doing and who they're hanging out with when away from home or school.