After nearly fourteen years the police can't even name a person of interest!
Why not?

In vinny's Anonymous Tip Line thread it is stated there are at least two people who think they know who abducted Jodi and why.
There must be some in the police who feel the same way so why not name a person of interest.

It appears this investigation is going to drift in limbo until the perpetrator comes forward with a full confession and a map with directions to Jodi's final resting place.
It is extremely rare for a homicide to be solved in this manner.

If the name of a person of interest is made public it would most likely reignite public interest and get some fresh information for the investigators.