Please see our previous post on this case here (it links to the briefs and other materials in the lower court).
Here is the Ottawa Tribe’s opening brief: appellant-brief
And here is the amicus brief signed by the National Congress of American Indians and several Michigan tribes on the laches question: brief-amici-curiae
And now the State of Ohio’s brief: brief-of-defendant-appellee-director-of-ohio-dept-of-natural