Here:
15-07-01 Members of Congress Amicus Brief (Sac & Fox Nation v. Borough, No. 14-1419)
15-07-02 Religious Groups Amicus Brief (Sac & Fox Nation v. Borough, No. 14-1419)
15-07-02 Scholars Amicus Brief (Sac & Fox Nation v. Borough of Jim Thorpe, No. 14-1419)
Petition is here.