Like I said, he could be legally committed. Base on what i know, does he exhibit traits of an actual depressed, suicidal person? No. I think he's full of snit.
Of course, I'm far away from Indiana so it doesn't matter. A generalization, but from people in college I observed or heard about that committed suicide, it's much more likely someone would say it as if a joke, or just be quiet [people don't notice quiet people] and do something like draw a picture of the 20 story library with an X on the ground, which people thought was very funny until the guy jumped from the library days later.
My best friend was a counselor at the walk in center and that whole floor of students was devastated. Just saying, if you know someone that seems withdrawn and is indirectly giving clues that's more likely a clinically depressed person struggling with thoughts.
If they go on the radio so they can tell everybody how messed up they are, I suppose they could be, but it's pretty much the opposite of what an actual depressed, suicidal person would do from what I understand.