If he has disclosed the conflict to both the Trust and to the County, and they have granted waivers, he is probably in the clear on the ethics issues.
I saw on a response to someone else you indicated that the names matched. If you haven't done so, you can check here
http://www.alabar.org/directory/dirSearch.cfm
to see if there are other lawyers by that name in the state.
One final point - have they tried to get a Tennessee address? I know of one case of a man living near a state line who had his address in one state, but actually resided in an adjacent state. It caused minor legal complications, but nothing that couldn't be dealt with.