The Muscogee (Creek) Nation has asked a federal appellate court to reinstate its lawsuit against the Poarch Creek Band of Indians and Auburn University for improperly removing graves from a sacred site in Alabama to build a casino.

The Oklahoma-based tribal nation alleges that Wind Creek Casino and Resort in Wetumpka, Alabama, was built at Hickory Ground, a sacred site and capital when federal troops forced the Muscogee out of Alabama nearly 200 years ago. Workers removed 57 sets of human remains and the artifacts buried with them, storing some of them in containers without proper ventilation or temperature control, according to the lawsuit, which was originally filed in 2012.