The family of the young man who died have filed a lawsuit recently, as reported by the Salt Lake Tribune. As the excerpt from the article (below) mentions, the fraternity and sorority have enterted into out of court settlements:
http://www.sltrib.com/news/ci_13046274
[I] . . . The suit seeks unspecified damages from the university and the state. The Starks have already reached out-of-court settlements with the national organizations of Sigma Nu and the Chi Omega sorority . . . .