Sharing the blame: Who else was involved in Bredesen's Watergate?

As an attorney for Lt. Ronnie Shirley claims his client is innocent of anything criminal (he doesn't seem to claim that his client is innocent of unauthorized activity), THP Col. Mike Walker says that more state employees in other departments are connected as they requested the unauthorized background checks. However, Walker will not release their names or departments where they employed. This opens up the very real possibility that some of the employees making the requests were higher up in the administration and that they may have had motives unknown to Shirley. It definitely sounds like more than just one employee being nosy.