AMANPOUR: Campus police at the community college that Jared Lee Loughner attended, were deputed to go out and -- and say that, you know, he looked a little bit like he needed some help. There were worries on campus about his demeanor. Why is it that it did not trigger further investigation?
KASTIGAR: Well -- and that has been a very controversial issue this past week. And a lot of folks have suggested that there were clues to his mental stability. But we're governed by laws And the laws allow us to do certain things, and restrict us from doing other things.
And I don't necessarily as a police professional question those. As a person I might. But we're bound by those laws. Those contacts that Jared Loughner had over the past couple of years were -- actually there were several, but each one was relatively benign. In their totality as viewed by law enforcement, they would not rise to the level of causing us to be necessarily concerned about him committing a violent act.
Because none of the acts were necessarily violent. He was disruptive in a Pima College classroom. And I personally don't want a police state where anybody who's perhaps has an opinion, or stands out in their classroom, or does something goofy in their classroom, gets arrested and then put in some kind of a mental rehab system. I'm not necessarily a proponent of that.
But I'm a little bit defensive. Perhaps you can tell that by my tone. That there are others out there -- there are criticisms that says, "Why didn't cops arrest this guy before?" Again, we're bound by the law. And the totality of those issues didn't rise to the level that would allow law enforcement to take action.
AMANPOUR: Well, let me go to David who's there with a friend of Jared Lee Loughner.
(MUIR): Stephen Cates, if I could ask you to stand up that would be great. And I know that you were in a poetry class with him, and we've heard a little bit about that -- the trademark pink hair this week. But you have been such a valued voice, because you were witness to him. You were in the same classroom with him. Were there warning signs that were missed?
CATES: Warning signs for violence? No. You know, in -- in the class that I had with him, he made people uncomfortable his -- the way he carried himself. People felt eerie around that, but there -- he didn't behave aggressively. I mean, even his poems were far from aggressive. And so it's hard to draw a line between someone being weird and standing out, you know, and --
MUIR: Tuscon loves you as we've learned from this event
CATES: And if you're going to try to police that somehow because, you know, again as the sheriff said, he didn't do anything that would merit police action or any kind of institutional intervention.
MUIR: It seemed like he was a very troubled young man and that there were people, even his math professor who said, this is a troubled student of mine. Did you seethat trouble?
CATES: You could see a lack of stability. Trouble -- it's -- that's perspective and so that's hard to really gauge when you're not in their head. But that's -- again, that's not something that can be measured because it's all perspective and that's all from whoever's looking at it and you can't -- you can't draw lines around something that's built on perspective.