I'm going to post this, even though it's going to be waaaay down where nobody sees it, just because it needs to be in here somewhere.
For starters, yes this bureaucrat is being a dick. However, I submit that he does not really think that David Cox made on his own a traffic report that is of "engineering quality". As people have pointed out, in this circumstance it would not be a crime.
What he is most likely thinks is that David Cox had an engineer produce an "engineering quality" traffic report, and the said engineer delivered it to Mr. Cox unsealed. This is not okay. I'm not sure about NC, but in Virginia if you are a PE, and you do engineering work, you must seal it (confirming it as your work product). This is an important requirement that helps to ensure the quality of work done by PEs. A PE who prepared an anonomys report could be in serious trouble with the licensing board.
This is the real angle Mr. Lacey is driving at, the other is just trying to put some kind of pressure on Mr. Cox to divulge where he got his help from. Notice the statement that Mr. Cox has refused to say who worked with him on the report, and probably won't, since they really have no leverage on him. All the same, there's likely and engineer down there sweating a bit, wanting this thing to blow over.