Could it be Creek Nation? Or maybe a patch of Cherokee Nation? If they’re saying Nation, those are really the only Tribal jurisdictions in that area covered by BACRN that I can think of.
I also can’t recall ever hearing Creek Nation PD on their conventional frequency when I lived in Tulsa and worked overnights covering news, even when they were pursuing, and the only way I would know was if either TPD, Sand Springs PD or OHP would broadcast an assistance call. So it could be them…
Definitely try to type in some addresses and cross streets to help nail it down. I know that’s not easy in Oklahoma where every town has the same W/E or N/S numbered streets and pretty much the same named streets (I.e. main, memorial, Oklahoma, Michigan etc.)😂