How to delete the index of a deleted account

Question

So here's the deal. I deleted an old Gmail account ( I think it was set up as imap) a few months ago. Last night I'm searching Mail and I find all of these hits, but the mailbox column is blank, I cannot read the message, and I cannot select "Show in Mailbox". I realized these were from my deleted account.
So I went into ~/library/mail and looked, but I found nothing for the deleted account, the actual messages are gone (which is fine), but the listings are still coming up in searches.
I turned Spotlight indexing for mail off, and even put ~/library/mail in the Spotlight privacy list.
No luck.
I've even rebuilt each mailbox (1 at a time), but still cannot get rid of these old email headings.
I know there is a way to force Mail to rebuild its index using a keyboard shortcut on Mail start-up, but I can't remember it.
Any advice would be much appreciated.
Thanks
Oh, in addition, I cannot move these to the trash or delete them either - they won't go away
Message was edited by: J Ashley

Answer 1

Thanks a lot for all your answers! :)
I finally got to do something with my little knowledge =P
I created a new class containing all the data needed for the dataTable (including a "String id").
And that's what I get:
<h:column>
     <a:commandLink
          value="#{familyAction.familyDocsByPrj.name}"
          action="#{homeAction.search(familyAction.familydocsByPrj.id)}"
          reRender="rightAppPanel" />
</h:column>