Here:
State of Michigan et al. Amicus Brief
Lower court materials here.
Here are the materials in State of Alabama v. PCI Gaming Authority (M.D. Ala.):
1 PBCI Notice of Removal + Exhibits
Here are the updated materials in State of Alabama v. PCI Gaming Authority (M.D. Ala.):
PBCI Notice of Removal + Exhibits
Prior post here.
News coverage here.