I would add the dexter-Ann arbor and perhaps that Detroit "5k " to the suspicious list on the map. And the crim one I posted.
Tc Tom- if u wanna do se sleuthing, go to athlinks and check out some of the local races which look unusual. Pay attention to the interval between races which is often really short. Them have at it. everything from 2004 on is probably fair game. People have concentrated mostly on the marathons but those little races often show interesting things.
Jacksonville 2006 is one that needs a good research.