[PW] religion at work

[Kump, Cindy]

This is for me as part of a library school assignment so no rush.  I'm analyzing a case study involving a public librarian who is being harrassed at work for her religious beliefs. 
 
I'm wondering about the question of wearing jewelry with religious symbols at work. Can that be construed as the government endorsing a particular religion if the person is employed by the county and is therefore representing the county government? I believe that it is a matter of personal expression but would like to find something to back up this idea.
 
I've searched Professional Development Collection, Library & Information Science Abstracts, Google and my public library catalog.  I'm finding a lot of information on the importance of setting aside personal convictions in collection development and while assisting patrons with finding information but nothing that directly addresses this issue.  I've tried various combinations of search terms.
 
I also looked at ALA's Code of Ethics.  Number 6 states: We do not advance private interests at the expense of library users, colleagues, or our employing institutions.  At what point does an outward sign of your religious faith constitute 'advancing private interests?'
 
Thanks in advance!
 
Cindy