Comma rule for this?

[Joyce Davis]

I've searched the comma sections of Morson and Gregg and don't find anything on this subject.

Here's an example:  Sergeant, you were assigned as the lead investigator of this case, is the way I understand it.

It's an apposition comma but oddly placed and not covered by Morson and Gregg in their comma sections.

Gregg would likely suggest rewriting the sentence, but we can't do that.

Anybody know of a rule I can hang my hat on?

Thanks...Joyce Davis

[Cindy Clark]

Hi Joyce.  I believe I might use the following rule in this case:

Rule 73: Use a comma or commas to set off parenthetical expressions that interrupt the smooth flow of the sentence or that come at the end of the sentence. These may be words, phrases, or clauses.  However, the court reporter, in some cases, must decide if the break is helpful or emphatic.  If it is, use the commas; if it is not, omit the commas.

However, my reasoning is as follows:  It's as if what should have been the introductory phrase was placed at the end, out of place, and it reads better with the punctuation there.  A semicolon would make too hard of a stop, whereas a comma does show a small pause and separation here that is appropriate.   

Just my opinion! 
 

[Joyce Davis]

Thanks, Cindy...Joyce