You can find numerous reports on the Oaxaca human rights situation via google by simply entering the phrase Oaxaca human rights. Here are a few useful refrences from that search:

Useful links on Oaxaca human rights abuses (updated Dec. 27, 2006)

http://web.amnesty.org/web/web.nsf/print/296E93964FB3414D8025724A003B9F02
Amnesty International report on Oaxaca detentions after Nov. 25 crackdown by federal police.

http://web.amnesty.org/pages/mex-201206-action-eng
Amnesty International brief report on Oaxaca

http://www.democracynow.org/article.pl?sid=06/12/20/1443211#transcript
broadcast from Oaxaca regarding recent abuses by police and continuing peaceful protests

http://www.un.org/apps/news/story.asp?NewsID=20428&Cr=human&Cr1=rights
United Nations report on abuses in Oaxaca

info@rightsaction.org
Look for December 26, 2006 report on Oaxaca and what you can do to help