I think I heard that Iowa City was bringing in more bail bondsmen to deal with all the extra football players that will now be out on the streets since the season is over. This is probably just a charter of them to help with the overflow.
If it was... why wouldn't they just fly direct to IA City... a private plane doesn't have to stop at a commercial airport:
City of Iowa City, Iowa - Official Web Site
Ann Arbor has an airport aswell, why land in Detriot? that flight flew to cedar rapids first and is now on its way back
Judging by that crude map and my rusty memory where Ann Arbor is in relation to Detroit, that airport is just minutes from Ann Arbor.
You know, in the future when people can be beamed from one location to another - we're gonna be screwed in tracking down coaching prospects unless we can trace atom vapor trails.