Heres wikipedia on the post, but Gene Cretz is also listed as having been named ambassador to Ghana in August:
I found the same thing and looked further.
J. Christopher Stevens
Ambassador
Libya
Term of Appointment: 05/22/2012 to presentAmbassador J. Christopher Stevens is a career member of the Senior Foreign Service. He arrived in Tripoli in May 2012 as U.S. Ambassador to Libya. Ambassador Stevens served twice previously in Libya. He served as Special Representative to the Libyan Transitional National Council from March 2011 to November 2011 during the Libyan revolution and as the Deputy Chief of Mission from 2007 to 2009.
Hm.
From a year and a half ago, March 14, 2011:
http://libya.usembassy.gov/principal.html
I am sad to confirm that it seems to be that man.
Norwegian press posted a picture of him when he was pulled out of the building.
Here he was in a government video when he was named to the post:
http://www.youtube.com/watch?v=y_SIIxholL4
The revolution turned on its own. This traitor is in hell and deserves it.