The Creeping Sharia blog has been following the story. The professor, Richard T. Antoun, was, apparently, a convert to Judaism. His assailant, Abdulsalam Al-Zahrani, is a Saudi national. From the description given by his roommates, he sounds like he had a screw or two loose (obvious). Take a look at these two posts for details: Muslim Grad Student Stabs Binghamton (NY) Middle Eastern Studies Professor to Death and Muslim students tried to avoid Binghamton killer, others say he 'acted like terrorist', felt persecuted.

Update: More news and links at American Thinker: Professor slain by Saudi grad student