him removed from the class and it was because of complaints from a variety of students. some of them apparently felt uncomfortable and didn't like his presence in the classroom. so he was asked to be removed from the class. the first time i was really struck by him was because he used inappropriate reactions to people's emotional content. he would laugh at things that were sad. he just didn't seem to be aware of what was going on. >> so as you probably know by now, the school kicked loughner out last fall. officials told him he couldn't return until he had a mental evaluation. as far as we know he never did have that evaluation, even with the college, his family, his friends, all of them knew something was wrong. the question now, could they have done something? would it have mattered? later this hour i'll talk to a psychiatrist who thinks he understands, at least in part, what drove the accused shooter to kill.