The case is Ogden v. Iowa Tribe of Kansas and Nebraska. From the opinion:
In March of 2006, Larry Ogden, after communication with the tribal chairman of the “Iowa Tribe Executive Committee,” moved to Missouri to accept employment as manager of a truck stop near I-29 in Holt County, Missouri, known as the “Squaw Creek Eagles Nest Plaza.” Several months later, Ogden was terminated from employment. Ogden sued the “Iowa Tribe of Kansas and Nebraska” (“Iowa Tribe”) for breach of an employment agreement and for wrongful discharge. The Iowa Tribe filed a motion to dismiss the petition based upon tribal sovereign immunity. The trial court granted the motion to dismiss. Ogden appeals. We affirm.