A suspect has been arrested, according to the San Francisco Chronicle's web site:
'Christopher Wootton, who loved '80s music, poker, baseball and football, according to his MySpace page, would have received his undergraduate degree later this month and was going to begin graduate school in nuclear engineering at UC Berkeley in the fall.
Berkeley police arrested Andrew Thomas Hoeft-Edenfield, 20, of Berkeley in connection with the killing, police Sgt. Mary Kusmiss said."
See:
http://www.sfgate.com/cgi-bin/articl...MNN710GH3C.DTL
The San Jose Mercury News has an article, too, which says there are no other suspects:
http://origin.mercurynews.com/crime/ci_9147440