(CNN) White House aides narrow search for anonymous op-ed writer to a few people, source says.

There are clues, but short of coercive means that would be strikingly illegal, there is no logical way to actually pin-point the culprit.

A few suspects? Bosh! It’s time to call in Sherlock Holmes, or better yet, the

Pink Panther

If you recall the surprise denouement, they were all guilty.