Suspect?

Can someone please explain to me why we are refering to Nidal Hasan as a "suspect" in the Fort Hood shootings? Now I wasn't their but are they not sure? Is he just a "person of interest?" Did they not catch him red handed? "Is this the man who was shooting at you?" "Gee, I'm not sure it was all so blury. Ah, maybe?" COME ON! He did it! Quit calling him a "suspect". That's what drives me nuts about this country. They never want to offend anyone. And by trying not to offend, they insult our intellegence. Well, I'm hitting the hay now! Good night all!