Here:
Apache Stronghold Opening Brief
Religious Liberty Groups Brief
Religious Liberty Law Scholars Brief
Case tag here.
Here.
Here is the press release from Rep. Raúl Grijalva on the matter. Gizmodo coverage here.
And the briefs in Apache Stronghold v. United States (9th Cir.):
Religious Liberty Scholars Amicus Brief
Lower court materials here.
Update:
Here are the materials in Apache Stronghold v. United States (D. Ariz.):
Here.