The Gila River Indian Community has sued to block the Tohono O'odham Nation's project, contending in its original lawsuit that the U.S. Interior Department acted illegally and skirted its own policies when it agreed to take land into trust on behalf of the nation.
In a court filing Tuesday, Gila River asked a judge to accept an updated lawsuit.
It contends that newly discovered evidence indicates that previous Tohono O'odham land purchases totaling 16,000 acres exceeded a 9,880-acre cap set under federal law, before the 2003 purchase of a 135-acre parcel that includes the proposed 54-acre casino site.