I've been searching right along with all of you and although this is probably nothing, I'm coming out of lurkdom to post this.
http://www.nola.com/forums/searching/index.ssf?artid=38738
The age, ties to Indiana and the three brothers fit to what Mr. Kyle believes he remembers. I don't know enough about post-traumatic stress and schizophrenia to know if this rules Mr. Kyle out though.
If Benjaman's nurse (or anyone) thinks it's a possible match and wants to respond to her post, feel free!
Back to searching and lurkdom.